Add support for aliased namespace re-exports

[nbrahms]

See https://www.typescriptlang.org/docs/handbook/modules.html#re-exports

Checklist:

• [ ] All tests pass in CI.
• [ ] There are sufficient tests for the new fix/feature.
• [ ] Grammar rules have not been renamed unless absolutely necessary.
• [ ] The conflicts section hasn't grown too much.
• [ ] The parser size hasn't grown too much (check the value of STATE_COUNT in src/parser.c).

[nbrahms]

Closing in favor of https://github.com/tree-sitter/tree-sitter-javascript/pull/180/