Install older Psalm on 8.1

Author: trowski

.github/workflows/ci.yml

@@ -9,6 +9,9 @@ jobs:
     strategy:
       matrix:
         include:
+          - operating-system: 'ubuntu-latest'
+            php-version: '8.1'
+
           - operating-system: 'ubuntu-latest'
             php-version: '8.2'
 

composer.json

@@ -17,7 +17,7 @@
     "require-dev": {
         "amphp/php-cs-fixer-config": "^2",
         "phpunit/phpunit": "^9",
-        "psalm/phar": "6.15.1"
+        "psalm/phar": "5.23.1 | 6.15.1"
     },
     "autoload": {
         "psr-4": {