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/source-map.js b/node_modules/source-map-js/source-map.js
new file mode 100644
index 0000000..bc88fe8
--- /dev/null
+++ b/node_modules/source-map-js/source-map.js
@@ -0,0 +1,8 @@
+/*
+ * Copyright 2009-2011 Mozilla Foundation and contributors
+ * Licensed under the New BSD license. See LICENSE.txt or:
+ * http://opensource.org/licenses/BSD-3-Clause
+ */
+exports.SourceMapGenerator = require('./lib/source-map-generator').SourceMapGenerator;
+exports.SourceMapConsumer = require('./lib/source-map-consumer').SourceMapConsumer;
+exports.SourceNode = require('./lib/source-node').SourceNode;