LPD-15905 Upgrade deprecated actions to Node 20

Actions using Node 16 are deprecated and should be updated to Node 20
actions.

Drop support for composer cache, we almost never build this anyway so I
do not want to spend time maintaining a caching strategy that is never
used anyway.

.github/workflows/test.yaml

@@ -3,58 +3,40 @@ on: push
 
 jobs:
   test-php7_2:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         prefer: ["prefer-stable", "prefer-lowest"]
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
           php-version: '7.2'
           tools: composer:v2
 
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: |
-          echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - uses: actions/cache@v3
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}-${{ matrix.prefer }}-
-          restore-keys: ${{ runner.os }}-composer-${{ matrix.prefer }}-
       - name: Composer Install
         run: composer update --${{ matrix.prefer }} --no-interaction --no-progress --no-ansi
 
       - name: Run tests
         run: make check
   test-php8:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         prefer: [ "prefer-stable", "prefer-lowest" ]
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.0'
+          php-version: '8.3'
           tools: composer:v2
 
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: |
-          echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - uses: actions/cache@v3
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}-${{ matrix.prefer }}-
-          restore-keys: ${{ runner.os }}-composer-${{ matrix.prefer }}-
       - name: Composer Install
         run: composer update --${{ matrix.prefer }} --no-interaction --no-progress --no-ansi