Upgrade to Psalm 6

Author: trowski

.github/workflows/ci.yml

@@ -11,6 +11,7 @@ jobs:
         include:
           - operating-system: 'ubuntu-latest'
             php-version: '8.1'
+            psalm: 'skip'
 
           - operating-system: 'ubuntu-latest'
             php-version: '8.2'
@@ -20,14 +21,9 @@ jobs:
 
           - operating-system: 'ubuntu-latest'
             php-version: '8.4'
-            static-analysis: none
-            style-fix: none
 
           - operating-system: 'ubuntu-latest'
             php-version: '8.5'
-            static-analysis: none
-            style-fix: none
-
 
     name: PHP ${{ matrix.php-version }} ${{ matrix.job-description }}
 
@@ -69,6 +65,10 @@ jobs:
             composer-${{ runner.os }}-
             composer-
 
+      - name: Remove psalm/phar
+        run: composer remove --no-update --dev psalm/phar
+        if: matrix.psalm == 'skip'
+
       - name: Install dependencies
         uses: nick-invision/retry@v2
         with:
@@ -84,7 +84,7 @@ jobs:
 
       - name: Run static analysis
         run: vendor/bin/psalm.phar
-        if: matrix.static-analysis != 'none'
+        if: matrix.psalm != 'skip'
 
       - name: Run style fixer
         env:

composer.json

@@ -31,7 +31,7 @@
         "amphp/phpunit-util": "^3",
         "phpunit/phpunit": "^9",
         "amphp/php-cs-fixer-config": "^2",
-        "psalm/phar": "5.23"
+        "psalm/phar": "6.15.1"
     },
     "autoload": {
         "psr-4": {

psalm.xml

@@ -27,6 +27,12 @@
             </errorLevel>
         </MissingClosureReturnType>
 
+        <PossiblyUnusedMethod>
+            <errorLevel type="suppress">
+                <directory name="src"/>
+            </errorLevel>
+        </PossiblyUnusedMethod>
+
         <RiskyTruthyFalsyComparison>
             <errorLevel type="suppress">
                 <directory name="src"/>