Your requirements could not be resolved to an installable set of packages. Problem 1 - automattic/vipwpcs 2.0.0 requires wp-coding-standards/wpcs ^2.1 -> found wp-coding-standards/wpcs[2.1.0, ..., 2.3.0] but it conflicts with your root composer.json require (^3). - automattic/vipwpcs[2.1.0, ..., 2.3.4] require wp-coding-standards/wpcs ^2.3 -> found wp-coding-standards/wpcs[2.3.0] but it conflicts with your root composer.json require (^3). - Root composer.json requires automattic/vipwpcs ^2 -> satisfiable by automattic/vipwpcs[2.0.0, ..., 2.3.4].