Updated the files.

my-app/node_modules/@webassemblyjs/ast/scripts/util.js

@@ -0,0 +1,38 @@
+function iterateProps(obj, iterator) {
+  Object.keys(obj).forEach((key) => iterator({ ...obj[key], name: key }));
+}
+
+function mapProps(obj) {
+  return Object.keys(obj).map((key) => ({ ...obj[key], name: key }));
+}
+
+function filterProps(obj, filter) {
+  const ret = {};
+  Object.keys(obj).forEach((key) => {
+    if (filter(obj[key])) {
+      ret[key] = obj[key];
+    }
+  });
+  return ret;
+}
+
+function typeSignature(meta) {
+  const type = meta.array ? `Array<${meta.type}>` : meta.type;
+  if (meta.optional) {
+    return `${meta.name}?: ${type}`;
+  } else if (meta.maybe) {
+    return `${meta.name}: ?${type}`;
+  } else {
+    return `${meta.name}: ${type}`;
+  }
+}
+
+const unique = (items) => Array.from(new Set(items));
+
+module.exports = {
+  iterateProps,
+  mapProps,
+  filterProps,
+  typeSignature,
+  unique,
+};