Provide specs for main API

[seancorfield]

Per https://clojureverse.org/t/next-jdbc-early-access/4091/31 -- add specs and document how to use them.

Provide an instrument function in the next.jdbc.specs namespace to make it easy to instrument the API.

Consider doing the same for next.jdbc.sql.specs.

[seancorfield]

@holyjak How does https://github.com/seancorfield/next-jdbc/blob/master/doc/getting-started.md#support-from-specs look?

[holyjak]

very good! thank you!

…

On Wed, May 22, 2019, 7:20 AM Sean Corfield ***@***.***> wrote: @holyjak <https://github.com/holyjak> How does https://github.com/seancorfield/next-jdbc/blob/master/doc/getting-started.md#support-from-specs look? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#21?email_source=notifications&email_token=AAEYSPRNSGOGKY6TVQXXEATPWTJZHA5CNFSM4HN5TRQ2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODV55UPI#issuecomment-494656061>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEYSPVDQC6JMHEYHCHZIYLPWTJZHANCNFSM4HN5TRQQ> .

[seancorfield]

This will be in Beta 1, coming soon.