This release offers build fixes related to building the module on Cen…

…tOS and using tarantoolctl rocks.

- Fixed static build (which is default one) on CentOS (#37).
- Fixed building using tarantoolctl rocks and enable static linking of mosquitto in it (#44).

Allows building mqtt library statically

With STATIC_BUILD=ON option all dependencies will be linked statically

Also this version contains some minor fixes in a code base, such as:
- improve error messages (#17)
- fix runtime error (#21)

And non-code changes:
- README updates (#23, #26, #26, #31)
- CI improvements (#29)

stable

Release version 1.2.1 with rockspecs

* Build issues have been fixed

Cleanup repo

Cleanup repo

Update README.md