Update github workflow to only test php 7.4

Author: ksassnowski

.github/workflows/run-tests.yml

@@ -8,15 +8,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        php: [7.4, 7.3, 7.2]
+        php: [7.4]
         laravel: [7.*, 6.*]
         dependency-version: [prefer-lowest, prefer-stable]
         os: [ubuntu-latest]
         include:
           - laravel: 7.*
-            testbench: 5.*
           - laravel: 6.*
-            testbench: 4.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}
 
@@ -38,7 +36,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+          composer require "laravel/framework:${{ matrix.laravel }}" --no-interaction --no-update
           composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-suggest
+
       - name: Execute tests
-        run: vendor/bin/phpspec run
+        run: vendor/bin/pest