🔧 update checkout@v3 to checkout@v4 on all actions + update test lib

.github/workflows/docs.yml

@@ -12,7 +12,7 @@ jobs:
     name: Publish Documentation
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: set up Ruby
       uses: ruby/setup-ruby@v1

.github/workflows/linting.yml

@@ -11,7 +11,7 @@ jobs:
     name: Run Static Analysis
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: recursive
 

.github/workflows/publish.yml

@@ -9,7 +9,7 @@ jobs:
     name: Publish to Rubygems
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         submodules: recursive
 

.github/workflows/test-code-samples.yml

@@ -20,7 +20,7 @@ jobs:
           - "3.2"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: recursive