Updated GitHub Actions workflow (#40)

- Added Node.js 22 to test matrix
- Upgraded to actions checkout@v4 and setup-node@v4
- Dropped EOL Node versions from automatic testing on macos-latest

.github/workflows/build.yml

@@ -8,8 +8,15 @@ jobs:
 
     strategy:
       matrix:
-        virtual-environment: ['ubuntu-latest', 'macos-latest', 'windows-2019']
-        node: [12, 14, 16, 18, 20, 21]
+        virtual-environment: ['ubuntu-latest', 'windows-2019']
+        node: [12, 14, 16, 18, 20, 22]
+        include:
+          - virtual-environment: 'macos-latest'
+            node: 18
+          - virtual-environment: 'macos-latest'
+            node: 20
+          - virtual-environment: 'macos-latest'
+            node: 22
 
     runs-on: ${{ matrix.virtual-environment }}
 
@@ -19,10 +26,10 @@ jobs:
       run: git config --global core.autocrlf false
 
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Setup Node.js ${{ matrix.node }}
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node }}