"types" field in package.json should point to a `.d.ts` file.

[latin-1]

-  "types": "src/index.ts",
+  "types": "dist/index.d.ts",

tsc will do type-checking on that file regardless of skipLibCheck if that's a pure .ts file (not a .d.ts file), which may result in compile errors.

(e.g., we set importsNotUsedAsValues to "error" in our project and tsc will complain about the .ts files inside node_modules/@math.gl/core)