Only upload to codecov on php 8, latest deps

Author: TamasSzigeti

.github/workflows/continuous_integration.yml

@@ -93,4 +93,5 @@ jobs:
       - uses: codecov/codecov-action@v2.0.2 # upload the coverage to codecov
         with:
           fail_ci_if_error: true # optional (default = false)
-        if: ${{ github.repository == 'thecodingmachine/graphqlite' }} # Do not upload in forks
+        # Do not upload in forks, and only on php8, latest deps
+        if: ${{ github.repository == 'thecodingmachine/graphqlite' && matrix.php-version == '8.0' && matrix.install-args == '' }}