Is pg_similarity still maintained?

I need to use similarity on my full text search on postgresql and I found pg_similarity and pg_search. According to the commits on the github the last commit on pg_similarity has 3 years. Is it maintained or should I use pg_search for my queries?

I know that a long time has passed since this question was asked, but the answer is yes, pg_similarityis still maintained. After the question was asked, multiple commits were made to that repo. This is a great repo.