add php 8.4 support and bump workflow actions (#10)

Author: akondas

.github/workflows/build.yml

@@ -9,11 +9,12 @@ jobs:
       matrix:
         php-version:
           - "8.3"
+          - "8.4"
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: "Installing PHP"
       uses: "shivammathur/setup-php@v2"
@@ -22,7 +23,7 @@ jobs:
         ini-values: memory_limit=-1
 
     - name: "Install composer dependencies"
-      uses: "ramsey/composer-install@v2"
+      uses: "ramsey/composer-install@v3"
 
     - name: Run test suite
       run: PHP_CS_FIXER_IGNORE_ENV=1 composer build