* 144 - `non_utf_columns` | handle blobs and other UTF character sets
* 145 - `non_utf_columns` | add table schema in reported context 145
* 147 - Detect empty databases
* 149 - `queries_not_using_index` | handle "No tables used"
* 157 - Report low cardinality indices
* 160 - drop support for Python 2.7, MySQL 5.5, 5.6 and MariaDB 10.0
MySQL 5.5 support ended in December 2015
MySQL 5.6 - February 2018
MariaDB 10.0 - March 201
Python 2.7 will be gone by the end of 2019