Update vimeo/psalm requirement + Fix BC checker

Co-authored-by: Sergei Predvoditelev <sergei@predvoditelev.ru>

.github/workflows/bc.yml

@@ -3,13 +3,12 @@ on:
   - push
 
 name: backwards compatibility
+
 jobs:
   roave_bc_check:
-    name: Roave BC Check
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@master
-      - name: fetch tags
-        run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-      - name: Roave BC Check
-        uses: docker://nyholm/roave-bc-check-ga
+    uses: yiisoft/actions/.github/workflows/bc.yml@master
+    with:
+      os: >-
+        ['ubuntu-latest']
+      php: >-
+        ['8.0']

composer.json

@@ -35,7 +35,7 @@
         "rector/rector": "^0.15.2",
         "roave/infection-static-analysis-plugin": "^1.18",
         "spatie/phpunit-watcher": "^1.23",
-        "vimeo/psalm": "^4.22",
+        "vimeo/psalm": "^4.30|^5.6",
         "yiisoft/test-support": "^1.4"
     },
     "autoload": {

psalm.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0"?>
 <psalm
     errorLevel="1"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="false"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"