Do not run tests on PHP 7.3

Author: JaZo

.github/workflows/tests.yml

@@ -9,16 +9,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '7.3', '7.4', '8.0', '8.1' ]
+        php: [ '7.4', '8.0', '8.1' ]
         laravel: [ '6.*', '7.*', '8.*', '9.*' ]
         stability: [ prefer-lowest, prefer-stable ]
         exclude:
           - laravel: '6.*'
             php: '8.1'
           - laravel: '7.*'
             php: '8.1'
-          - laravel: '9.*'
-            php: '7.3'
           - laravel: '9.*'
             php: '7.4'