is*ScopeBoundary

[ajafff]

• add new function isTypeScopeBoundary
  • TypeAlias
  • Interface
  • MappedType
  • ConditionalType
  • maybe CallExpression and NewExpression: WIP - Allow infer types in expression type argument positions microsoft/TypeScript#22368
• isFunctionScopeBoundary
  • add boolean parameter to always consider SourceFile a boundary
  • remove all type-only boundaries
• introduce ScopeBoundarySelector

export const enum ScopeBoundary {
    None = 0,
    Function = 1,
    Block = 2,
    Type = 4,
}
export const enum ScopeBoundarySelector {
    Function = ScopeBoundary.Function,
    Block = Function | ScopeBounary.Block,
    Type = Block | ScopeBoundary.Type,
}