Reland "Reland "Update stylelint to 14.0.1""

This reverts commit 2b4a9df2d922bb9d183fe2f816da40dda2e87790.

Reason for revert: subsequent presubmit uploads should be fixed now.

Original change's description:
> Revert "Reland "Update stylelint to 14.0.1""
>
> This reverts commit f2ea2c940dd62b3295047e03959c89c237e216c8.
>
> Reason for revert: https://ci.chromium.org/ui/p/devtools-frontend/builders/try/dtf_presubmit_linux/b8831129368825517985/overview
>
> Original change's description:
> > Reland "Update stylelint to 14.0.1"
> >
> > This reverts commit 6c0f161c95acd70706aeed4e1167ab1c28f88eee.
> >
> > Reason for revert: the prerequisite CL (https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3259703) has landed
> >
> > Original change's description:
> > > Revert "Update stylelint to 14.0.1"
> > >
> > > This reverts commit 1e08ee816bab192a7d295d2f457be97bd88c09c1.
> > >
> > > Reason for revert: tree is closed due to errors https://ci.chromium.org/ui/p/devtools-frontend/builders/ci/Stand-alone%20Linux/8169/overview
> > >
> > > Original change's description:
> > > > Update stylelint to 14.0.1
> > > >
> > > > This also upgrades PostCSS to 8.3.11.
> > > >
> > > > DISABLE_THIRD_PARTY_CHECK=Updating Stylelint configuration
> > > > R=​szuend@chromium.org
> > > >
> > > > Bug: none
> > > > Change-Id: I606540b03509d7c6e73f3d490327cd4174e03d31
> > > > Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3259541
> > > > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > > > Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
> > >
> > > Bug: none
> > > Change-Id: Icb1c02b41dbccc3b4fc5760f5dd0b78eca078b61
> > > No-Presubmit: true
> > > No-Tree-Checks: true
> > > No-Try: true
> > > Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3263399
> > > Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> > > Owners-Override: Alex Rudenko <alexrudenko@chromium.org>
> > > Commit-Queue: Alex Rudenko <alexrudenko@chromium.org>
> >
> > DISABLE_THIRD_PARTY_CHECK=Updating Stylelint configuration
> >
> > Bug: none
> > Change-Id: If132a67ee4253d27114caedd66c5ee61c774a6c7
> > Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3264206
> > Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
> > Reviewed-by: Simon Zünd <szuend@chromium.org>
> > Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
>
> Bug: none
> Change-Id: Idc6c9f5cc1e225c752799461eb0344e94b4ad1e5
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3264222
> Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>

DISABLE_THIRD_PARTY_CHECK=Updating Stylelint configuration

Bug: none
Change-Id: I609941d48b46bfcf454b03dcc75a76d460fbe674
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3264223
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/node_modules/source-map-js/lib/array-set.js b/node_modules/source-map-js/lib/array-set.js
new file mode 100644
index 0000000..fbd5c81
--- /dev/null
+++ b/node_modules/source-map-js/lib/array-set.js
@@ -0,0 +1,121 @@
+/* -*- Mode: js; js-indent-level: 2; -*- */
+/*
+ * Copyright 2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+
+var util = require('./util');
+var has = Object.prototype.hasOwnProperty;
+var hasNativeMap = typeof Map !== "undefined";
+
+/**
+ * A data structure which is a combination of an array and a set. Adding a new
+ * member is O(1), testing for membership is O(1), and finding the index of an
+ * element is O(1). Removing elements from the set is not supported. Only
+ * strings are supported for membership.
+ */
+function ArraySet() {
+  this._array = [];
+  this._set = hasNativeMap ? new Map() : Object.create(null);
+}
+
+/**
+ * Static method for creating ArraySet instances from an existing array.
+ */
+ArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
+  var set = new ArraySet();
+  for (var i = 0, len = aArray.length; i < len; i++) {
+    set.add(aArray[i], aAllowDuplicates);
+  }
+  return set;
+};
+
+/**
+ * Return how many unique items are in this ArraySet. If duplicates have been
+ * added, than those do not count towards the size.
+ *
+ * @returns Number
+ */
+ArraySet.prototype.size = function ArraySet_size() {
+  return hasNativeMap ? this._set.size : Object.getOwnPropertyNames(this._set).length;
+};
+
+/**
+ * Add the given string to this set.
+ *
+ * @param String aStr
+ */
+ArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
+  var sStr = hasNativeMap ? aStr : util.toSetString(aStr);
+  var isDuplicate = hasNativeMap ? this.has(aStr) : has.call(this._set, sStr);
+  var idx = this._array.length;
+  if (!isDuplicate || aAllowDuplicates) {
+    this._array.push(aStr);
+  }
+  if (!isDuplicate) {
+    if (hasNativeMap) {
+      this._set.set(aStr, idx);
+    } else {
+      this._set[sStr] = idx;
+    }
+  }
+};
+
+/**
+ * Is the given string a member of this set?
+ *
+ * @param String aStr
+ */
+ArraySet.prototype.has = function ArraySet_has(aStr) {
+  if (hasNativeMap) {
+    return this._set.has(aStr);
+  } else {
+    var sStr = util.toSetString(aStr);
+    return has.call(this._set, sStr);
+  }
+};
+
+/**
+ * What is the index of the given string in the array?
+ *
+ * @param String aStr
+ */
+ArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {
+  if (hasNativeMap) {
+    var idx = this._set.get(aStr);
+    if (idx >= 0) {
+        return idx;
+    }
+  } else {
+    var sStr = util.toSetString(aStr);
+    if (has.call(this._set, sStr)) {
+      return this._set[sStr];
+    }
+  }
+
+  throw new Error('"' + aStr + '" is not in the set.');
+};
+
+/**
+ * What is the element at the given index?
+ *
+ * @param Number aIdx
+ */
+ArraySet.prototype.at = function ArraySet_at(aIdx) {
+  if (aIdx >= 0 && aIdx < this._array.length) {
+    return this._array[aIdx];
+  }
+  throw new Error('No element indexed by ' + aIdx);
+};
+
+/**
+ * Returns the array representation of this set (which has the proper indices
+ * indicated by indexOf). Note that this is a copy of the internal array used
+ * for storing the members so that no one can mess with internal state.
+ */
+ArraySet.prototype.toArray = function ArraySet_toArray() {
+  return this._array.slice();
+};
+
+exports.ArraySet = ArraySet;