Add packages to optimize svgs dynamically

These packages will be used to dynamically optimize SVG images
during the build.

R=jacktfranklin@chromium.org

Bug: 1216402
Change-Id: I04e95aa7d79c9d67beaf8a7861182c52b16b7d0f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2939992
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/node_modules/csso/lib/clean/Comment.js b/node_modules/csso/lib/clean/Comment.js
new file mode 100644
index 0000000..aa80108
--- /dev/null
+++ b/node_modules/csso/lib/clean/Comment.js
@@ -0,0 +1,3 @@
+module.exports = function cleanComment(data, item, list) {
+    list.remove(item);
+};