Log Message:
Update to hslua-module-system-0.2.2.1

0.2.2.1 -- 2020-10-16
* Relaxed upper bound for hslua, allow hslua-1.3.*.

0.2.2 -- 2020-08-15
* Relaxed upper bound for hslua, allow hslua-1.2.*.
* Improved documentation of internal types.
* Use tasty-lua for unit tests.
* Update CI to test with all GHC versions.