Add PHP 8.3 and bump actions (#156)

Author: williamdes

.github/workflows/test-unit.yml

@@ -11,13 +11,13 @@ jobs:
     strategy:
       matrix:
         operating-system: [ 'ubuntu-latest' ]
-        php-versions: [ '5.6', '7.0', '7.1', '7.2', '7.3', '8.0', '8.1', '8.2' ]
+        php-versions: [ '5.6', '7.0', '7.1', '7.2', '7.3', '8.0', '8.1', '8.2', '8.3' ]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Cache vendor
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: |
             vendor
@@ -34,4 +34,4 @@ jobs:
         run: '[ -e vendor ] || composer install'
 
       - name: Run Tests
-        run: make deps test
+        run: make deps test