(maint) Update GitHub Actions runners and actions

This commit updates GitHub Actions to move away from both operating
systems and Actions that are nearing or past end-of-life.

Author: mhashizume

.github/workflows/daily_unit_tests_with_nightly_puppet_gem.yaml

@@ -10,19 +10,19 @@ jobs:
     name: ${{ matrix.os_type }} / Puppet${{ matrix.puppet_version }} gem / Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        os: [ 'ubuntu-18.04', 'macos-10.15', 'windows-2019' ]
+        os: [ 'ubuntu-20.04', 'macos-11', 'windows-2019' ]
         puppet_version: [ 6, 7 ]
         include:
           - puppet_version: 6
             ruby: 2.5
           - puppet_version: 7
             ruby: 2.7
 
-          - os: 'ubuntu-18.04'
+          - os: 'ubuntu-20.04'
             os_type: 'Linux'
             env_set_cmd: 'export '
             gem_file: 'puppet-latest.gem'
-          - os: 'macos-10.15'
+          - os: 'macos-11'
             os_type: 'macOS'
             env_set_cmd: 'export '
             gem_file: 'puppet-latest-universal-darwin.gem'
@@ -34,7 +34,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install ruby version ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1

.github/workflows/static_code_analysis.yaml

@@ -15,10 +15,10 @@ jobs:
       ruby_version: 2.6
       extra_checks: check:symlinks check:git_ignore check:dot_underscore check:test_file
 
-    runs-on: 'ubuntu-18.04'
+    runs-on: 'ubuntu-20.04'
     steps:
       - name: Checkout current PR code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 

.github/workflows/unit_tests_with_nightly_puppet_gem.yaml

@@ -12,19 +12,19 @@ jobs:
     name: ${{ matrix.os_type }} / Puppet${{ matrix.puppet_version }} gem / Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        os: [ 'ubuntu-18.04', 'macos-10.15', 'windows-2019' ]
+        os: [ 'ubuntu-20.04', 'macos-11', 'windows-2019' ]
         puppet_version: [ 6, 7 ]
         include:
           - puppet_version: 6
             ruby: 2.5
           - puppet_version: 7
             ruby: 2.7
 
-          - os: 'ubuntu-18.04'
+          - os: 'ubuntu-20.04'
             os_type: 'Linux'
             env_set_cmd: 'export '
             gem_file: 'puppet-latest.gem'
-          - os: 'macos-10.15'
+          - os: 'macos-11'
             os_type: 'macOS'
             env_set_cmd: 'export '
             gem_file: 'puppet-latest-universal-darwin.gem'
@@ -36,7 +36,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current PR code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install ruby version ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1

.github/workflows/unit_tests_with_released_puppet_gem.yaml

@@ -12,17 +12,17 @@ jobs:
     name: ${{ matrix.os_type }} / Puppet${{ matrix.puppet_version }} gem / Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        os: [ 'ubuntu-18.04', 'macos-10.15', 'windows-2019' ]
+        os: [ 'ubuntu-20.04', 'macos-11', 'windows-2019' ]
         puppet_version: [ 6, 7 ]
         include:
           - puppet_version: 6
             ruby: 2.5
           - puppet_version: 7
             ruby: 2.7
 
-          - os: 'ubuntu-18.04'
+          - os: 'ubuntu-20.04'
             os_type: 'Linux'
-          - os: 'macos-10.15'
+          - os: 'macos-11'
             os_type: 'macOS'
           - os: 'windows-2019'
             os_type: 'Windows'
@@ -32,7 +32,7 @@ jobs:
       PUPPET_GEM_VERSION: ~> ${{ matrix.puppet_version }}.0
     steps:
       - name: Checkout current PR code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install ruby version ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1