Travis is not free anymore

.travis.yml

@@ -1,13 +0,0 @@
-language: php
-php:
-  - 5.6
-  - 7.1
-  - 7.2
-  - 7.3
-  - 7.4
-  - 8.0
-  - 8.1
-  - 8.2
-  - 8.3
-  - 8.4
-script: git diff --name-only $TRAVIS_COMMIT_RANGE | grep '\.php$' | xargs -n1 -P8 php -l | grep -v 'No syntax errors'; test $? -eq 1