Fix CI for PHP 8.0+ minimum version

- Replace Docker-based Psalm action (bundles PHP 7.4) with setup-php
- Drop PHP 7.4 from test matrix
- Set phpVersion in psalm.xml for PHP 8.0+ analysis

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rfeiner

.github/workflows/psalm.yml

@@ -1,19 +1,23 @@
 name: Psalm
 
-# Controls when the action will run. 
 on: [push, pull_request]
 
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
-  # This workflow contains a single job called "build"
-  build:
-    # The type of runner that the job will run on
+  psalm:
     runs-on: ubuntu-latest
 
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v3
 
-      - name: Psalm – Static Analysis for PHP
-        uses: docker://vimeo/psalm-github-actions:4.18.1
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.0'
+          extensions: curl, json
+          tools: composer:v2
+
+      - name: Install dependencies
+        run: composer install --no-progress
+
+      - name: Run Psalm
+        run: vendor/bin/psalm --no-progress

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
+        php: [ '8.0', '8.1', '8.2', '8.3', '8.4' ]
         stability: [ prefer-stable ]
 
     name: PHP ${{ matrix.php }} - ${{ matrix.stability }}

psalm.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0"?>
 <psalm
     errorLevel="7"
+    phpVersion="8.0"
     resolveFromConfigFile="true"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"