- Upgrades deps to latest.
- Abstracts concerns to own files.
- Implements new method signature for lookup and bulkLookup to allow optional params.
- Implements dotenv with autoconfig for api key.
- Exports types for "lru-cache".
- Renovates tests.
- Add typed errors.
- Implements bin call via "lookup".
- Update package.json to point to correct github repo.
- Update readme.

- Fix incorrect env key.
- Remove artefacts from Windows cmd bin.
- Export shaped type for LRU cache.
- Add comments.
- Attempt to resolve constants from env before using fallbacks.