Small update to mysql-native (A fully-D client library for MySQL/MariaDB that doesn't depend on any external MySQL/MariaDB libs).

The most interesting thing in v2.3.0 is that, thanks to @jpf91, the column names for a result set can now be obtained directly from the Row (via `Row.getName(columnIndex)`).

Aside from that, this release just involves some internal cleanups (with much more still to come) and a rather major reworking of the test runner script.

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One important note for mysql-native users to be aware of (And this goes for all of mysql-native, not just this particular version):

Starting with MySQL Server v8.0.4, the server's default authentication mechanism was changed. Unfortunately, mysql-native does not yet support this new authentication style. For now, if you have sufficient admin privileges for your DB server, you can temporarily work around the issue like this:

https://dev.mysql.com/doc/refman/8.0/en/upgrading-from-previous-series.html#upgrade-caching-sha2-password-compatibility-issues

Naturally, I consider fixing this the current top priority for mysql-native. But as I've been rather busy lately I haven't had as much time for this as I would like, so I would encourage any able-bodied coders to please beat me to it! Other mysql-native users will be appreciative. More details on the issue here:

https://github.com/mysql-d/mysql-native/issues/189

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mysql-native Home on GitHub:
    https://github.com/mysql-d/mysql-native

mysql-native on Dub:
    http://code.dlang.org/packages/mysql-native

mysql-native API reference:
    http://semitwist.com/mysql-native