Bump WPCS to 3.0.0

[mukeshpanchal27]

Is your enhancement related to a problem? Please describe.

The latest version of WPCS 3.0.0 is released yesterday. We should update it so we can remove some development version dependancies and more sniffs.

Designs

No response

Describe alternatives you've considered

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[mukeshpanchal27]

https://github.com/Automattic/VIP-Coding-Standards did not support latest version so we have to wait some time to update this.