Harden GitHub workflows

Author: samdark

.github/workflows/bc.yml

@@ -23,9 +23,11 @@ on:
 
 name: backwards compatibility
 
+permissions:
+  contents: read
 jobs:
   roave_bc_check:
-    uses: yiisoft/actions/.github/workflows/bc.yml@master
+    uses: yiisoft/actions/.github/workflows/bc.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     with:
       os: >-
         ['ubuntu-latest']

.github/workflows/build.yml

@@ -24,10 +24,9 @@ name: build
 
 permissions:
   contents: read
-
 jobs:
   phpunit:
-    uses: yiisoft/actions/.github/workflows/phpunit.yml@master
+    uses: yiisoft/actions/.github/workflows/phpunit.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     secrets:
       codecovToken: ${{ secrets.CODECOV_TOKEN }}
     with:

.github/workflows/composer-require-checker.yml

@@ -24,9 +24,11 @@ on:
 
 name: Composer require checker
 
+permissions:
+  contents: read
 jobs:
   composer-require-checker:
-    uses: yiisoft/actions/.github/workflows/composer-require-checker.yml@master
+    uses: yiisoft/actions/.github/workflows/composer-require-checker.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     with:
       os: >-
         ['ubuntu-latest']

.github/workflows/mutation.yml

@@ -20,9 +20,11 @@ on:
 
 name: mutation test
 
+permissions:
+  contents: read
 jobs:
   mutation:
-    uses: yiisoft/actions/.github/workflows/infection.yml@master
+    uses: yiisoft/actions/.github/workflows/infection.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     with:
       os: >-
         ['ubuntu-latest']

.github/workflows/static.yml

@@ -22,9 +22,11 @@ on:
 
 name: static analysis
 
+permissions:
+  contents: read
 jobs:
   psalm:
-    uses: yiisoft/actions/.github/workflows/psalm.yml@master
+    uses: yiisoft/actions/.github/workflows/psalm.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     with:
       os: >-
         ['ubuntu-latest']