catch3/CMake, branch v2.2.3

catch3/CMake, branch v2.2.3 Progmasoft Catch3: an independently maintained C++17 test framework with a parallel runner, property checks, snapshots and structured results. Add codecov.io coverage tracking 2017-11-27T19:13:47+00:00 Martin Hořeňovský 2017-11-25T15:58:29+00:00 e344984a1b0c1c4f267d3dbfaa73bb5874a86211 * Every Linux build tracks coverage when running Debug mode * OS X not supported yet (Future WIP) * Our own unit tests, non-default reporters and Clara are ignored

* Every Linux build tracks coverage when running Debug mode
* OS X not supported yet (Future WIP)
* Our own unit tests, non-default reporters and Clara are ignored