Harden GitHub workflows

.github/dependabot.yml

@@ -1,6 +1,6 @@
 version: 2
 updates:
-    # Maintain dependencies for GitHub Actions.
+  - package-ecosystem: "github-actions"\n    directory: "/"\n    schedule:\n      interval: "weekly"\n    cooldown:\n      default-days: 7\n    ignore:\n      - dependency-name: "yiisoft/*"\n    # Maintain dependencies for GitHub Actions.
     - package-ecosystem: "github-actions"
       directory: "/"
       schedule:

.github/workflows/bechmark.yml

@@ -24,6 +24,8 @@ on:
 
 name: bechmark
 
+permissions:
+  contents: read
 jobs:
   phpbench:
     uses: yiisoft/actions/.github/workflows/phpbench.yml@master

.github/workflows/build.yml

@@ -22,6 +22,8 @@ on:
 
 name: build
 
+permissions:
+  contents: read
 jobs:
   phpunit:
     uses: yiisoft/actions/.github/workflows/phpunit.yml@master

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

@@ -24,6 +24,8 @@ 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

@@ -20,6 +20,8 @@ on:
 
 name: mutation test
 
+permissions:
+  contents: read
 jobs:
   mutation:
     uses: yiisoft/actions/.github/workflows/roave-infection.yml@master

.github/workflows/static.yml

@@ -22,6 +22,8 @@ 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
+  contents: read
+
+jobs:
+  zizmor:
+    uses: yiisoft/actions/.github/workflows/zizmor.yml@master