This backports several build and test tool improvements to the 5.5 branch. Most notably, this includes:
- The changes required to allow each workflow to be triggered by the `workflow_dispatch` event so that tests can be run on a schedule [50590].
- The ability to run PHPUnit tests from `src` instead of `build` [50441-50443].
- Splitting single site and multisite tests into parallel jobs [50379].
- Split slow tests into separate, parallel jobs for PHP 5.6 [50444].
- Better branch and path scoping for GitHub Action workflows when running on `pull_request` [50432,50479].
- Several `devDependency` updates.
Merges [50267,50299,50379,50387,50413,50416,50432,50435-50436,50441-50444,50446,50473-50474,50476,50479,50485-50487,50545,50579,50590,50592,50598] to the 5.5 branch.
See #50401, #51734, #51801, #51802, #52548, #52608, #52612, #52623, #52624, #52625, #52645, #52653, #52658, #52660, #52667, #52786.
Built from https://develop.svn.wordpress.org/branches/5.5@50603
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This updates the 5.5 branch to support the latest LTS version of NodeJS (currently 14.x) in an effort to allow the same version of NodeJS to be used across all WordPress branches receiving security updates as a courtesy.
In addition to backporting the package updates that happened after branching 5.5, dependencies that were removed in future releases have also been updated to their latest versions.
Props desrosj, dd32, netweb, jorbin.
Merges [48705,49636,49933,49937,49939-49940,49983,49989-49990,50016-50017,50126,50176,50185] to the 5.5 branch.
See #52341.
Built from https://develop.svn.wordpress.org/branches/5.5@50188
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