Harden GitHub workflows

.github/dependabot.yml

@@ -1,16 +1,20 @@
 version: 2
 updates:
-    # Maintain dependencies for GitHub Actions.
-    - package-ecosystem: "github-actions"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      # Too noisy. See https://github.community/t/increase-if-necessary-for-github-actions-in-dependabot/179581
-      open-pull-requests-limit: 0
+  # Maintain dependencies for GitHub Actions.
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    ignore:
+      - dependency-name: "yiisoft/*"
 
-    # Maintain dependencies for Composer
-    - package-ecosystem: "composer"
-      directory: "/"
-      schedule:
-          interval: "daily"
-      versioning-strategy: increase-if-necessary
+  # Maintain dependencies for Composer
+  - package-ecosystem: "composer"
+    directory: "/"
+    schedule:
+        interval: "daily"
+    versioning-strategy: increase-if-necessary
+    cooldown:
+      default-days: 7

.github/workflows/bc.yml_

@@ -8,7 +8,7 @@ jobs:
         name: Roave BC Check
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@master
+            - uses: actions/checkout@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
             - name: fetch tags
               run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
             - name: Roave BC Check

.github/workflows/build.yml

@@ -22,6 +22,9 @@ on:
 
 name: build
 
+permissions:
+  contents: read
+
 jobs:
   phpunit:
     uses: yiisoft/actions/.github/workflows/phpunit.yml@master

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

@@ -24,6 +24,9 @@ on:
 
 name: Composer require checker
 
+permissions:
+  contents: read
+
 jobs:
   composer-require-checker:
     uses: yiisoft/actions/.github/workflows/composer-require-checker.yml@master

.github/workflows/mutation.yml_

@@ -21,7 +21,7 @@ name: mutation test
 
 jobs:
   mutation:
-    uses: yiisoft/actions/.github/workflows/roave-infection.yml@master
+    uses: yiisoft/actions/.github/workflows/roave-infection.yml@ab62d6b3b0e0cff6c9724ec5a395bedb41c639a2
     with:
       os: >-
         ['ubuntu-latest']

.github/workflows/rector.yml

@@ -1,5 +1,5 @@
 on:
-  pull_request_target:
+  pull_request:
     paths-ignore:
       - 'docs/**'
       - 'README.md'
@@ -11,13 +11,15 @@ on:
 
 name: rector
 
+permissions:
+  contents: read
+
 jobs:
   rector:
+    permissions:
+      contents: write # Required by the reusable Rector workflow to commit changes back to PR branches.
     uses: yiisoft/actions/.github/workflows/rector.yml@master
-    secrets:
-      token: ${{ secrets.YIISOFT_GITHUB_TOKEN }}
     with:
-      repository: ${{ github.event.pull_request.head.repo.full_name }}
       os: >-
         ['ubuntu-latest']
       php: >-

.github/workflows/static.yml

@@ -22,6 +22,9 @@ on:
 
 name: static analysis
 
+permissions:
+  contents: read
+
 jobs:
   psalm:
     uses: yiisoft/actions/.github/workflows/psalm.yml@master

.github/workflows/zizmor.yml

@@ -0,0 +1,22 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+  pull_request:
+    paths:
+      - '.github/**.yml'
+      - '.github/**.yaml'
+
+permissions:
+  actions: read # Required by zizmor when reading workflow metadata through the API.
+  contents: read # Required to read workflow files.
+
+jobs:
+  zizmor:
+    uses: yiisoft/actions/.github/workflows/zizmor.yml@master