[wp-trac] [WordPress Trac] #52341: Upgrade old branches to run on NodeJS LTS (currently 14.x)

[WordPress Trac]

#52341: Upgrade old branches to run on NodeJS LTS (currently 14.x)
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 Reporter:  desrosj                         |       Owner:  desrosj
     Type:  task (blessed)                  |      Status:  assigned
 Priority:  high                            |   Milestone:  5.7
Component:  Build/Test Tools                |     Version:
 Severity:  normal                          |  Resolution:
 Keywords:  needs-testing has-patch commit  |     Focuses:
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Comment (by desrosj):

 Thanks for taking a look @netweb!

 I've fixed a few discrepancies in JS files I found in 4.2-4.4 branches
 (see #52367) today, as well as updating all branches with `autoprefixer`
 to include [50017] from `trunk`, and 5.5 to include [50016].

 I have also reverted all browser specific CSS changes that happened as a
 result of running `grunt browserify` or `grunt precommit:css`. This
 decreased the number of files changed further (between 10-40 depending on
 the branch). Ensuring the correct browser prefixes are present (or not) is
 not a part of this effort, it just happened as a result of testing the
 various Grunt scripts.

 Excluding these will also allow #52331 to progress separately. The
 companion `WordPress/WordPress` PRs have also been updated for comparison.

 I opened a PR to test backporting the package updates to 5.6. Even though
 it already runs on NodeJS 14.x, we should also bring that branch up to
 date with `trunk` so that everything is in sync. Will probably commit that
 tomorrow, and probably start on the 5.x branches.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52341#comment:31>
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