Release 1.0.3 - Githubissues

PR for tracking changes for the 1.0.3 release.

Release checklist

[x] Verify, and if necessary, update the version constraints for dependencies in the composer.json - N/A
[x] Verify that any new functions have type declarations whenever possible - N/A
[x] Add changelog for the release - PR #453 :pencil2: Remember to add a release link at the bottom!

[x] Merge this PR
[x] Make sure all CI builds are green.
[x] Tag and create a release (careful, GH defaults to develop!) & copy & paste the changelog to it. :pencil2: Don't forget to copy the link collection from the bottom of the changelog!
[x] Make sure all CI builds are green.
[x] Verify that the website regenerated correctly.
[x] Close the milestone
[x] Open a new milestone for the next release
[x] If any open PRs/issues which were milestoned for this release did not make it into the release, update their milestone. - N/A
[x] Fast-forward develop to be equal to stable

[ ] Tweet about the release.
[ ] Inform the primary dependants of this repo (PHPCSExtra, WordPressCS, PHPCompatibility and VariableAnalysis) about the release.