GH Actions: fix check complete not running in quick test

PR 73 removed the `lint` key from the quick test matrix, but this condition was not adjusted at the time, which meant that the feature complete integration test was not being run anymore in quick test.

Author: jrfnl

.github/workflows/quicktest.yml

@@ -80,7 +80,7 @@ jobs:
       # This also acts as an integration test for the feature completeness script,
       # which is why it is run against various PHP versions and not in the "Sniff" stage.
       - name: Check for feature completeness
-        if: ${{ matrix.lint }}
+        if: ${{ matrix.phpcs_version == 'dev-master' }}
         run: composer check-complete
 
       - name: Run the unit tests