Fix IFCLoader bundling on modern Node

[darshan-Jahagirdar]

Fixes #120.

The current build fails before bundling with modern Node because rollup-plugin-typescript2@0.30.0 depends on an old nested tslib and tries to load tslib/package.json, which is blocked by the package exports map.

This updates rollup-plugin-typescript2 to 0.36.0, which uses a compatible tslib and lets the existing Rollup build complete without changing loader source code.

Verification:

• npm ci --ignore-scripts
• npm run build from the repo root: passed, including web-ifc-three and example
• git diff --check

Note: npm test -- --runInBand still fails on existing Jest/TypeScript transform configuration before running tests; it is unrelated to this bundling fix.