Adds tests and test dependencies, based on a new environment variable.
Updates change log. Documents difference in generated key return between
MySQL and MariaDB.
`next.jdbc.connection` namespace docstring now mentions `dbtypes` and
`->pool`. **Primary API** in the migration doc now explicitly recommends
using a datasource for piecemeal migration.
Make `dbtypes` public again (oops!). Note that it _won't_ contain defaults (if folks feel they need them, they can easily be added). Use `:host :none` in `dbtypes` to indicate a local database (no `:host`/`:port` segment) which is more consistent with how users would specify a new database.
Reduce the number of special cases in the JDBC URL assembly, now that `:host :none` from `dbtypes` can drive that.
* Remove `execute!` and `execute-one!` from `result-set`.
* Add `-execute-all` and `-execute-one` to the `Executable` protocol
instead.
* Remove `:row-fn` support.
* Allow a `PreparedStatement` to be `Connectable` so it can be used with
`datafy`/`nav`.
* Rewrite `RowBuilder` protocol and add `ResultSetBuilder` protocol; add
`as-arrays` as a builder.
