Coding Standards: Upgrade WPCS to 1.0.0

WPCS 1.0.0 includes a bunch of new auto-fixers, which drops the number of coding standards issues across WordPress significantly. Prior to running the auto-fixers, there were 15,312 issues detected. With this commit, we now drop to 4,769 issues.

This change includes three notable additions:
- Multiline function calls must now put each parameter on a new line.
- Auto-formatting files is now part of the `grunt precommit` script. 
- Auto-fixable coding standards issues will now cause Travis failures.

Fixes #44600.



git-svn-id: https://develop.svn.wordpress.org/trunk@43571 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/theme/customHeader.php

@@ -359,7 +359,8 @@ class Tests_Theme_Custom_Header extends WP_UnitTestCase {
 		global $_wp_theme_features;
 
 		$_wp_theme_features['custom-header'][0] = wp_parse_args(
-			$args, array(
+			$args,
+			array(
 				'default-image'          => '',
 				'random-default'         => false,
 				'width'                  => 0,