According to the Typescript Docs, TS expects to find a "types" property in the package.json "exports" declaration

When moduleResolution is set to node16, nodenext, or bundler, and resolvePackageJsonExports is not disabled, TypeScript follows Node.js’s package.json "exports" spec when resolving from a package directory triggered by a bare specifier node_modules package lookup.

Because libsql-js does not, I receive this error:

Could not find a declaration file for module 'libsql'. '/node_modules/.pnpm/[email protected]/node_modules/libsql/index.js' implicitly has an 'any' type.
  There are types at '/node_modules/libsql/types/index.d.ts', but this result could not be resolved when respecting package.json "exports". The 'libsql' library may need to update its package.json or typings.ts

I have tested this locally, and this resolves the issue.

NOTE: I did not implement a fix for the promise based API, as I was not sure what you all wanted to do in terms of extending the types/index.d.ts.