Note: project being refactored into monorepo

[amilajack]

compat-db has become a pretty large project. I found it useful to split the project into smaller projects. I have created a new project called ast-node-type-verifier. This new project takes the responsibility of inferring metadata about API's (specifically the ast node types of API's). The responsibility of compat-db will shift to focus solely on testing the compatibility of certain API's.