Oracle enhanced adapter 5.2.6 has been released

[Yasuo Honda]

Hi,

Oracle enhanced adapter 5.2.6 has been released. 

Please install and run your applications by updating your Gemfile as follows.

```

gem "activerecord-oracle_enhanced-adapter", "~> 5.2.0"

```

* Changes and bug fixes

  * Add TCP keepalive and TCP keepalive time configurations [#1874 #1878]

  * CI against Ruby 2.6.2 and 2.5.5 [#1849]

  * CI against Ruby 2.4.6 [#1858]

For all changes and fixes please read the following document.

https://github.com/rsim/oracle-enhanced/blob/release52/History.md#526--2019-05-17

Thanks,

--

Yasuo Honda