Add static analysis to the Composer QA job

This adds Psalm to the QA job, so that it's included in that task,
ensuring that the code is as maintainable as possible.

Author: settermjd

composer.json

@@ -65,6 +65,7 @@
     "scripts": {
         "check": [
             "@cs-check",
+            "@static-analysis",
             "@test"
         ],
         "cs-check": "phpcs",