Log Message:
(devel/check) Updated 0.12.0 to 0.13.0

Sat Oct 20, 2019: Released Check 0.13.0
  based on hash 2b18886a9a9d3bab44917a550d12128ad7e2c197

* configure: optional build documentation
  Issue #206 (GitHub)

* missing <unistd.h> in some files
  Issue #196 and Issue #186 (GitHub)

* Varous documentation improvements

* END_TEST is now optional, as how START_TEST works has been redone
  Issue #158

* Various CMake related changes:
  - Support exporting Check to other projects with CMake 3
    Issue #185
  - Shared library support for Visual Studio
    Issue #220
  - Fix wrong library filename
    Issue #226
  - Add support for CMake package registry
    Issue #227
  - CMake build type can now be debug or release
    Issue #228
  - Add checkmk to CMake build.