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/MinifyHTMLHelperTest.php

@@ -80,4 +80,4 @@ class MinifyHTMLHelperTest extends TestCase
             $this->assertEquals($maxTime, $output, 'utils.php : Minify_mtime w/ obj & group');
         }
     }
-}
+}