Use parallel lint

Author: kelunik

.travis.yml

@@ -22,5 +22,5 @@ install:
   - composer show -t
 
 script:
-  - find -name "*.php" -not -path "./vendor/*" -print0 | xargs -n 1 -0 php -l
-  - php vendor/bin/phpunit --coverage-text --coverage-clover build/logs/clover.xml
+  - php vendor/bin/parallel-lint --exclude vendor .
+  - php vendor/bin/phpunit --coverage-text --coverage-clover build/logs/clover.xml

composer.json

@@ -7,7 +7,9 @@
         "php": ">=5.4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4|^5"
+        "phpunit/phpunit": "^4|^5",
+        "jakub-onderka/php-parallel-lint": "^0.9.2",
+        "jakub-onderka/php-console-highlighter": "^0.3.2"
     },
     "autoload": {
         "psr-4": {