Release script: create tag after building CDN files
Keep bower_components in .gitignore.
Updating version to 2.1.0-beta2.
Updating the source version to 2.1.0-pre✓™
Release script: Add .npmignore and keep .gitignore when creating the tag
Release script: Add dist files in multiple commits for a clean final commit with a small diff
Ref #14503: Cherry-pick tests.
(cherry picked from commit 27b22f4ef5f3f291204f0e0f9f414ac503f6c8a8)
(cherry picked from commit 8dc0f2ea84e1861d8d8dfa7699268368c659f8e9)
(cherry picked from commit 936126f10de193e2bb1c8280dbc2361ca5d62e29)