travis: drop tests from phsptan, too many errors

Author: TomasVotruba

.travis.yml

@@ -22,7 +22,7 @@ install:
 script:
   - vendor/bin/phpunit --coverage-clover=coverage.xml -v
   - if [[ $ECS != "" ]]; then temp/ecs/bin/ecs check src tests; fi
-  - if [[ $PHPSTAN != "" ]]; then vendor/bin/phpstan analyse src tests --level max --configuration phpstan.neon; fi
+  - if [[ $PHPSTAN != "" ]]; then vendor/bin/phpstan analyse src --level max --configuration phpstan.neon; fi
 
 after_script:
   - wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar;