Updated the files.

my-app/node_modules/fs-monkey/docs/api/patchFs.md

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+# `patchFs(vol[, fs])`
+
+Rewrites Node's filesystem module `fs` with *fs-like* object.
+
+ - `vol` - fs-like object
+ - `fs` *(optional)* - a filesystem to patch, defaults to `require('fs')`
+
+```js
+import {patchFs} from 'fs-monkey';
+
+const myfs = {
+    readFileSync: () => 'hello world',
+};
+
+patchFs(myfs);
+console.log(require('fs').readFileSync('/foo/bar')); // hello world
+```
+
+You don't need to create *fs-like* objects yourself, use [`memfs`](https://github.com/streamich/memfs)
+to create a virtual filesystem for you:
+
+```js
+import {vol} from 'memfs';
+import {patchFs} from 'fs-monkey';
+
+vol.fromJSON({'/dir/foo': 'bar'});
+patchFs(vol);
+console.log(require('fs').readdirSync('/')); // [ 'dir' ]
+```

my-app/node_modules/fs-monkey/docs/api/patchRequire.md

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+# `patchRequire(vol[, unixifyPaths[, Module]])`
+
+Patches Node's `module` module to use a given *fs-like* object `vol` for module loading.
+
+ - `vol` - fs-like object
+ - `unixifyPaths` *(optional)* - whether to convert Windows paths to unix style paths, defaults to `false`.
+ - `Module` *(optional)* - a module to patch, defaults to `require('module')`
+
+Monkey-patches the `require` function in Node, this way you can make
+Node.js to *require* modules from your custom filesystem.
+
+It expects an object with three filesystem methods implemented that are
+needed for the `require` function to work.
+
+```js
+let vol = {
+    readFileSync: () => {},
+    realpathSync: () => {},
+    statSync: () => {},
+};
+```
+
+If you want to make Node.js to *require* your files from memory, you
+don't need to implement those functions yourself, just use the
+[`memfs`](https://github.com/streamich/memfs) package:
+
+```js
+import {vol} from 'memfs';
+import {patchRequire} from 'fs-monkey';
+
+vol.fromJSON({'/foo/bar.js': 'console.log("obi trice");'});
+patchRequire(vol);
+require('/foo/bar'); // obi trice
+```
+
+Now the `require` function will only load the files from the `vol` file
+system, but not from the actual filesystem on the disk.
+
+If you want the `require` function to load modules from both file
+systems, use the [`unionfs`](https://github.com/streamich/unionfs) package
+to combine both filesystems into a union:
+
+```js
+import {vol} from 'memfs';
+import {patchRequire} from 'fs-monkey';
+import {ufs} from 'unionfs';
+import * as fs from 'fs';
+
+vol.fromJSON({'/foo/bar.js': 'console.log("obi trice");'});
+ufs
+    .use(vol)
+    .use(fs);
+patchRequire(ufs);
+require('/foo/bar.js'); // obi trice
+```