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/ScssSourceTest.php

@@ -39,4 +39,4 @@ class ScssSourceTest extends TestCase
 
         $this->assertEquals("/min/g=scss&{$max}", $res);
     }
-}
+}