0.17.0

Added

• Added the filter operators not_in and not_contains.
• Added examples for integration with Relay to the documentation.
• Added examples for the parameter format to the documentation.

Changed

• Refactored the query builder. This does not affect users of the library, but
  makes the code base more readable and lays the groundwork for upcoming
  features.
• Added the :query_opts option to Flop callbacks to pass on options to the
  Ecto repo on query execution. If you are already using the :prefix option
  you now have to pass this through :query_opts.

If you configured the Repo :prefix in the application config:

config :flop,
-  prefix: "some-prefix"
+  query_opts: [prefix: "some-prefix"]

If you set the :prefix when calling the Flop functions:

- Flop.validate_and_run(Pet, params, prefix: "some-prefix")
+ Flop.validate_and_run(Pet, params, query_opts: [prefix: "some-prefix"])