Parse type imports in TSImportEqualsDeclaration

[JLHwung]

Q	A
Fixed Issues?	Fixes #12957
Patch: Bug Fix?	Y
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?
License	MIT

This PR implements parsing support on type imports in TSImportEqualsDeclaration

import type A = require("A");
export import type B = require("B");

Similar to what we did for ImportDeclaration, an enum property importKind: "value" | "type" will be added to TsImportEqualsDeclaration.

Note that when importKind is "type", the TSModuleReference on the RHS can not be an Identifier or a TSQualfiedName, which becomes an import alias for TypeScript, e.g. both

import type A = B.C;

and

export import type B = C;

will throw "An import alias can not use 'import type'".

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[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/43681/

[SimenB]

Any news on this one? 👀

Seems relatively straightforward, but there's been a couple of bug fix releases without it, so I might be missing something

[nicolo-ribaudo]

Uh sorry, maybe @sosukesuzuki or @hzoo do you have time to quickly check if the changes seem ok? 🙏

[hzoo]

ok gave a look, looks good!

[nicolo-ribaudo]

I can release a patch tomorrow.