Updated the files.

my-app/node_modules/isbinaryfile/LICENSE.txt

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+Copyright (c) 2019 Garen J. Torikian
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

my-app/node_modules/isbinaryfile/README.md

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+# isBinaryFile
+
+Detects if a file is binary in Node.js using ✨promises✨. Similar to [Perl's `-B` switch](http://stackoverflow.com/questions/899206/how-does-perl-know-a-file-is-binary), in that:
+- it reads the first few thousand bytes of a file
+- checks for a `null` byte; if it's found, it's binary
+- flags non-ASCII characters. After a certain number of "weird" characters, the file is flagged as binary
+
+Much of the logic is pretty much ported from [ag](https://github.com/ggreer/the_silver_searcher).
+
+Note: if the file doesn't exist or is a directory, an error is thrown.
+
+## Installation
+
+```
+npm install isbinaryfile
+```
+
+## Usage
+
+Returns `Promise<boolean>` (or just `boolean` for `*Sync`). `true` if the file is binary, `false` otherwise.
+
+### isBinaryFile(filepath)
+
+* `filepath` -  a `string` indicating the path to the file.
+
+### isBinaryFile(bytes[, size])
+
+* `bytes` - a `Buffer` of the file's contents.
+* `size` - an optional `number` indicating the file size.
+
+### isBinaryFileSync(filepath)
+
+* `filepath` - a `string` indicating the path to the file.
+
+
+### isBinaryFileSync(bytes[, size])
+
+* `bytes` - a `Buffer` of the file's contents.
+* `size` - an optional `number` indicating the file size.
+
+### Examples
+
+Here's an arbitrary usage:
+
+```javascript
+const isBinaryFile = require("isbinaryfile").isBinaryFile;
+const fs = require("fs");
+
+const filename = "fixtures/pdf.pdf";
+const data = fs.readFileSync(filename);
+const stat = fs.lstatSync(filename);
+
+isBinaryFile(data, stat.size).then((result) => {
+  if (result) {
+    console.log("It is binary!")
+  }
+  else {
+    console.log("No it is not.")
+  }
+});
+
+const isBinaryFileSync = require("isbinaryfile").isBinaryFileSync;
+const bytes = fs.readFileSync(filename);
+const size = fs.lstatSync(filename).size;
+console.log(isBinaryFileSync(bytes, size)); // true or false
+```
+
+## Testing
+
+Run `npm install`, then run `npm test`.

my-app/node_modules/isbinaryfile/lib/index.d.ts

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+/// <reference types="node" />
+export declare function isBinaryFile(file: string | Buffer, size?: number): Promise<boolean>;
+export declare function isBinaryFileSync(file: string | Buffer, size?: number): boolean;

my-app/node_modules/isbinaryfile/lib/index.js

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+"use strict";
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.isBinaryFileSync = exports.isBinaryFile = void 0;
+const fs = require("fs");
+const util_1 = require("util");
+const statAsync = util_1.promisify(fs.stat);
+const openAsync = util_1.promisify(fs.open);
+const closeAsync = util_1.promisify(fs.close);
+const MAX_BYTES = 512;
+// A very basic non-exception raising reader. Read bytes and
+// at the end use hasError() to check whether this worked.
+class Reader {
+    constructor(fileBuffer, size) {
+        this.fileBuffer = fileBuffer;
+        this.size = size;
+        this.offset = 0;
+        this.error = false;
+    }
+    hasError() {
+        return this.error;
+    }
+    nextByte() {
+        if (this.offset === this.size || this.hasError()) {
+            this.error = true;
+            return 0xff;
+        }
+        return this.fileBuffer[this.offset++];
+    }
+    next(len) {
+        const n = new Array();
+        for (let i = 0; i < len; i++) {
+            n[i] = this.nextByte();
+        }
+        return n;
+    }
+}
+// Read a Google Protobuf var(iable)int from the buffer.
+function readProtoVarInt(reader) {
+    let idx = 0;
+    let varInt = 0;
+    while (!reader.hasError()) {
+        const b = reader.nextByte();
+        varInt = varInt | ((b & 0x7f) << (7 * idx));
+        if ((b & 0x80) === 0) {
+            break;
+        }
+        idx++;
+    }
+    return varInt;
+}
+// Attempt to taste a full Google Protobuf message.
+function readProtoMessage(reader) {
+    const varInt = readProtoVarInt(reader);
+    const wireType = varInt & 0x7;
+    switch (wireType) {
+        case 0:
+            readProtoVarInt(reader);
+            return true;
+        case 1:
+            reader.next(8);
+            return true;
+        case 2:
+            const len = readProtoVarInt(reader);
+            reader.next(len);
+            return true;
+        case 5:
+            reader.next(4);
+            return true;
+    }
+    return false;
+}
+// Check whether this seems to be a valid protobuf file.
+function isBinaryProto(fileBuffer, totalBytes) {
+    const reader = new Reader(fileBuffer, totalBytes);
+    let numMessages = 0;
+    while (true) {
+        // Definitely not a valid protobuf
+        if (!readProtoMessage(reader) && !reader.hasError()) {
+            return false;
+        }
+        // Short read?
+        if (reader.hasError()) {
+            break;
+        }
+        numMessages++;
+    }
+    return numMessages > 0;
+}
+function isBinaryFile(file, size) {
+    return __awaiter(this, void 0, void 0, function* () {
+        if (isString(file)) {
+            const stat = yield statAsync(file);
+            isStatFile(stat);
+            const fileDescriptor = yield openAsync(file, 'r');
+            const allocBuffer = Buffer.alloc(MAX_BYTES);
+            // Read the file with no encoding for raw buffer access.
+            // NB: something is severely wrong with promisify, had to construct my own Promise
+            return new Promise((fulfill, reject) => {
+                fs.read(fileDescriptor, allocBuffer, 0, MAX_BYTES, 0, (err, bytesRead, _) => {
+                    closeAsync(fileDescriptor);
+                    if (err) {
+                        reject(err);
+                    }
+                    else {
+                        fulfill(isBinaryCheck(allocBuffer, bytesRead));
+                    }
+                });
+            });
+        }
+        else {
+            if (size === undefined) {
+                size = file.length;
+            }
+            return isBinaryCheck(file, size);
+        }
+    });
+}
+exports.isBinaryFile = isBinaryFile;
+function isBinaryFileSync(file, size) {
+    if (isString(file)) {
+        const stat = fs.statSync(file);
+        isStatFile(stat);
+        const fileDescriptor = fs.openSync(file, 'r');
+        const allocBuffer = Buffer.alloc(MAX_BYTES);
+        const bytesRead = fs.readSync(fileDescriptor, allocBuffer, 0, MAX_BYTES, 0);
+        fs.closeSync(fileDescriptor);
+        return isBinaryCheck(allocBuffer, bytesRead);
+    }
+    else {
+        if (size === undefined) {
+            size = file.length;
+        }
+        return isBinaryCheck(file, size);
+    }
+}
+exports.isBinaryFileSync = isBinaryFileSync;
+function isBinaryCheck(fileBuffer, bytesRead) {
+    // empty file. no clue what it is.
+    if (bytesRead === 0) {
+        return false;
+    }
+    let suspiciousBytes = 0;
+    const totalBytes = Math.min(bytesRead, MAX_BYTES);
+    // UTF-8 BOM
+    if (bytesRead >= 3 && fileBuffer[0] === 0xef && fileBuffer[1] === 0xbb && fileBuffer[2] === 0xbf) {
+        return false;
+    }
+    // UTF-32 BOM
+    if (bytesRead >= 4 &&
+        fileBuffer[0] === 0x00 &&
+        fileBuffer[1] === 0x00 &&
+        fileBuffer[2] === 0xfe &&
+        fileBuffer[3] === 0xff) {
+        return false;
+    }
+    // UTF-32 LE BOM
+    if (bytesRead >= 4 &&
+        fileBuffer[0] === 0xff &&
+        fileBuffer[1] === 0xfe &&
+        fileBuffer[2] === 0x00 &&
+        fileBuffer[3] === 0x00) {
+        return false;
+    }
+    // GB BOM
+    if (bytesRead >= 4 &&
+        fileBuffer[0] === 0x84 &&
+        fileBuffer[1] === 0x31 &&
+        fileBuffer[2] === 0x95 &&
+        fileBuffer[3] === 0x33) {
+        return false;
+    }
+    if (totalBytes >= 5 && fileBuffer.slice(0, 5).toString() === '%PDF-') {
+        /* PDF. This is binary. */
+        return true;
+    }
+    // UTF-16 BE BOM
+    if (bytesRead >= 2 && fileBuffer[0] === 0xfe && fileBuffer[1] === 0xff) {
+        return false;
+    }
+    // UTF-16 LE BOM
+    if (bytesRead >= 2 && fileBuffer[0] === 0xff && fileBuffer[1] === 0xfe) {
+        return false;
+    }
+    for (let i = 0; i < totalBytes; i++) {
+        if (fileBuffer[i] === 0) {
+            // NULL byte--it's binary!
+            return true;
+        }
+        else if ((fileBuffer[i] < 7 || fileBuffer[i] > 14) && (fileBuffer[i] < 32 || fileBuffer[i] > 127)) {
+            // UTF-8 detection
+            if (fileBuffer[i] > 193 && fileBuffer[i] < 224 && i + 1 < totalBytes) {
+                i++;
+                if (fileBuffer[i] > 127 && fileBuffer[i] < 192) {
+                    continue;
+                }
+            }
+            else if (fileBuffer[i] > 223 && fileBuffer[i] < 240 && i + 2 < totalBytes) {
+                i++;
+                if (fileBuffer[i] > 127 && fileBuffer[i] < 192 && fileBuffer[i + 1] > 127 && fileBuffer[i + 1] < 192) {
+                    i++;
+                    continue;
+                }
+            }
+            suspiciousBytes++;
+            // Read at least 32 fileBuffer before making a decision
+            if (i >= 32 && (suspiciousBytes * 100) / totalBytes > 10) {
+                return true;
+            }
+        }
+    }
+    if ((suspiciousBytes * 100) / totalBytes > 10) {
+        return true;
+    }
+    if (suspiciousBytes > 1 && isBinaryProto(fileBuffer, totalBytes)) {
+        return true;
+    }
+    return false;
+}
+function isString(x) {
+    return typeof x === 'string';
+}
+function isStatFile(stat) {
+    if (!stat.isFile()) {
+        throw new Error(`Path provided was not a file!`);
+    }
+}

my-app/node_modules/isbinaryfile/package.json

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+{
+  "name": "isbinaryfile",
+  "description": "Detects if a file is binary in Node.js. Similar to Perl's -B.",
+  "version": "4.0.10",
+  "keywords": [
+    "text",
+    "binary",
+    "encoding",
+    "istext",
+    "is text",
+    "isbinary",
+    "is binary",
+    "is text or binary",
+    "is text or binary file",
+    "isbinaryfile",
+    "is binary file",
+    "istextfile",
+    "is text file"
+  ],
+  "devDependencies": {
+    "@types/jest": "^23.3.14",
+    "@types/node": "^10.17.59",
+    "jest": "^26.5.5",
+    "prettier": "^1.19.1",
+    "release-it": "^14.13.1",
+    "ts-jest": "^26.5.5",
+    "tslint": "^5.20.1",
+    "tslint-config-prettier": "^1.18.0",
+    "typescript": "^3.9.9"
+  },
+  "engines": {
+    "node": ">= 8.0.0"
+  },
+  "files": [
+    "lib/**/*"
+  ],
+  "license": "MIT",
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
+  "maintainers": [
+    {
+      "name": "Garen J. Torikian",
+      "email": "gjtorikian@gmail.com"
+    }
+  ],
+  "funding": "https://github.com/sponsors/gjtorikian/",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/gjtorikian/isBinaryFile"
+  },
+  "scripts": {
+    "build": "tsc",
+    "format": "prettier --write \"src/**/*.ts\" \"src/**/*.js\" && tslint --fix -c tslint.json 'src/**/*.ts'",
+    "lint": "tslint -p tsconfig.json",
+    "prepare": "npm run build",
+    "release": "release-it",
+    "prepublishOnly": "npm test && npm run lint",
+    "preversion": "npm run lint",
+    "version": "npm run format && git add -A src",
+    "postversion": "git push && git push --tags",
+    "test": "jest --config jestconfig.json",
+    "watch": "tsc -w"
+  }
+}