Ensure all version numbers in plugin match each other

[tofumatt]

Feature Description

Last release I forgot to update the constant value for GOOGLESITEKIT_VERSION, which @aaemnnosttv kindly caught before the release 😅

We should set up a PHP unit test that ensures all of these versions values are synced, so when we bump version values they aren't out-of-sync, like they were in a6fe45c8030b97476653f4e3c6360de6684e786a.

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Acceptance criteria

• A new PHP test should be introduced that ensures the version numbers in the following places are the same:
  • https://github.com/google/site-kit-wp/blob/0ea003eb33a2bfd79846ac0c227432429532f4c5/google-site-kit.php#L29
  • https://github.com/google/site-kit-wp/blob/0ea003eb33a2bfd79846ac0c227432429532f4c5/google-site-kit.php#L14
  • https://github.com/google/site-kit-wp/blob/0ea003eb33a2bfd79846ac0c227432429532f4c5/readme.txt#L7
  • First version value in: https://github.com/google/site-kit-wp/blob/0ea003eb33a2bfd79846ac0c227432429532f4c5/changelog.txt#L1-L3
  • Version number used at https://github.com/google/site-kit-wp/blob/0ea003eb33a2bfd79846ac0c227432429532f4c5/readme.txt#L110-L112

Implementation Brief

Check my draft PR for this ticket #8864

• [ ] Create a new phpunit test tests/phpunit/integration/VersionTest.php with a single test test_consistent_plugin_versions:
  • [ ] Use use REGEX with preg_match, to extract the first occurrence of the version number based on each pattern in the AC.
  • [ ] Compare all of these version values, if any of them are different, fail the test.

Test Coverage

• Tests outlined in implementation brief.

QA Brief

• No QA needed for this issue; if tests are passing then it can be moved to Approval.

Changelog entry

[benbowler]

As part of experimenting for the IB was able to create draft PR that meets this requirement, also I noticed that the changelog has 1.128.1 but the rest of the app (in develop) is showing 1.128.0.

When reviewing the IB, also review the draft PR.

[tofumatt]

@benbowler Yeah, the point release wasn't merged back into main/develop as standard, I think this point release was a bit unorthodox 😅

Good chance to test things out I guess 😆

IB looks good to me. IB ✅