Update CI to test against PHP 7.4 only for v0.8.x

Author: simonrjones

.github/workflows/php.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        php-versions: ['7.4', '8.0']
+        php-versions: ['7.4']
 
     runs-on: ubuntu-latest
 
@@ -39,7 +39,7 @@ jobs:
         run: composer validate
 
       - name: Install dependencies
-        run: composer install --prefer-dist --no-progress --no-suggest
+        run: composer install --prefer-dist --no-progress
 
       - name: Code lint PHP files
         run: ./vendor/bin/phplint