THIS IS BREAKING CHANGE

What is this change about?

TSImportType has boolean property isTypeOf that is inconsistent with other usages of typeof within AST structure.

isTypeOf property is unique (not used anywhere else in code)

type x = typeof import('x')

TSImportType:
  - isTypeOf: boolean

type x = typeof window

TSTypeQuery:
  - exprName: Identifier

Why we should change it?

• Improve consistency of ast structure.
• Align generated structure with babel representation
• Allow consumers (eg. prettier) to correctly place comment - link

  typeof /* comment */ import('x')