Per /u/LightShadow on reddit.com, this library violates the Google ToS:

This is against Google ToS.

The reason no other library exists is because they shouldn't exist at all.

If you want to use Google Search API you need to pay for credits.

JSON/Atom Custom Search API provides 100 search queries per day for free. If you need more, you may sign up for billing in the API Console. Additional requests cost $5 per 1000 queries, up to 10k queries per day.