Add phpcs ruleset which ignores camelCase errors
Update wp-plugin-dev-lib 4815f59...06df376: Install PHPUnit phar if PHPUnit is not installed

https://github.com/xwp/wp-plugin-dev-lib/compare/4815f59...06df376

4d5abcf Improve readability of Bash scripts
06df376 Install PHPUnit phar if PHPUnit is not installed