Use Case

As a... js-bson maintainer
I want... the library to build cleanly under TypeScript 6.0
So that... our CI exercises the full build pipeline, real regressions in upcoming TS versions are caught before they ship

User Experience

• check-typescript-next in .evergreen/config.yml flips from TRY_COMPILING_LIBRARY: "false" to "true"
• No behavioral change for end users - purely build-configuration maintenance.

Dependencies

• None

Risks/Unknowns

• N/A

Acceptance Criteria

Implementation Requirements

• In tsconfig.json: replace "moduleResolution": "node" with "bundler" (or justified alternative) - resolves TS5107.
• In tsconfig.json: add "rootDir": "src" - resolves TS5011, which TS 6.0 now requires when outDir is set with multiple source files.
• In .evergreen/config.yml, check-typescript-next task: flip TRY_COMPILING_LIBRARY from "false" to "true" and remove the accompanying TODO comment.
• Upgrade @microsoft/api-extractor if compatibility requires it.

Testing Requirements

• npm run build exits cleanly under TS 6.0 locally
• Diff emitted bson.d.ts and lib/* bundles against the TS 5.9.2 baseline; document/justify any non-trivial differences in the PR description.

Documentation Requirements

• None

Follow Up Requirements

• N/A