Support websearch_to_tsvector in full_text_search

[rgalanakis]

On this line: https://github.com/jeremyevans/sequel/blob/master/lib/sequel/adapters/shared/postgres.rb#L1819

Would be nice to be able to use :websearch too (which is websearch_to_tsquery vs. plainto_tsquery so isn't just adding another option.

Also maybe consider using the to_tsquery value verbatim if it ends with "to_tsquery"? That way it'd be proofed against new tsquery routines.

In the meantime I know I can pass in my own expression but it's not as clean. Thanks!

[jeremyevans]

I'm open to added support for that. Can you send in a pull request with adapter tests for it?

[jeremyevans]

I added support for this in d74dc5c

[rgalanakis]

You're a real mensch! Thanks Jeremy and sorry I wasn't able to get to it.