Apply php-cs-fixer fixers

- braces
- function_declaration
- lowercase_keywords
- method_argument_space
- no_spaces_inside_parenthesis
- no_trailing_whitespace
- no_trailing_whitespace_in_comment
- single_blank_line_at_eof

tests/MinifyNailgunClosureCompilerTest.php

@@ -54,4 +54,4 @@ class MinifyNailgunClosureCompilerTest extends TestCase
             $this->markTestSkipped($e->getMessage());
         }
     }
-}
+}