Don't use fail-fase in CI

We want to see test failures in whole matrix, so we don't focus on fixing one test failure, only so we have to fix another one after that

.github/workflows/continuous-integration.yml

@@ -9,9 +9,6 @@ on:
     branches:
       - "*.x"
 
-env:
-  fail-fast: true
-
 jobs:
   phpunit:
     name: "PHPUnit"
@@ -21,6 +18,7 @@ jobs:
       SYMFONY_DEPRECATIONS_HELPER: ${{matrix.symfony-deprecations-helper}}
 
     strategy:
+      fail-fast: false
       matrix:
         php-version:
           - "7.1"