support Lua 5.5

[luau-project]

Description

Support Lua 5.5

Important

I do not have any experience with this module (cluacov), I just saw @Tieske CI failing on luacov due this module and tried to update it to give a help. Since the tests on my branch were all passing, I decided to open this PR.

Changes

• Added Lua 5.5.0 llimits.h and lobject.h headers

• Minimal additions and edits on deepactivelines.c to account for Lua 5.5

• Yet on deepactivelines.c file, the code for Lua 5.5 required a minimal change regarding the field is_vararg. Such field cannot be found on Proto struct anymore. Instead, Roberto provided a macro called isvararg, which serves the same purpose

• For AppVeyor and Travis CI providers, the latest hererocks is installed directly from its repository. This change was done to be able to install Lua 5.5 and LuaRocks 3.13.0;

• Following the idea of AppVeyor that installs luacov directly from its repository

  cluacov/appveyor.yml

  Lines 21 to 22 in e81e0f9

  	- git clone --depth=1 https://github.com/lunarmodules/luacov
  	- cd luacov && luarocks make && cd ..

now each CI provider is also installing luacov from its repo.

• Now, each CI provider also installs busted from its repo, because the version hosted on LuaRocks had a change in the control variable that was only addressed at fix(lua5.5): add local variable lunarmodules/busted#760.

Notes

• The changes in the GitHub workflow were tested and confirmed to work;
• The changes on AppVeyor and Travis YAML files were not tested.

[luau-project]

@Tieske

following your advices, the recent changes were:

• removed AppVeyor and Travis CI workflows
• restored the behavior to install busted from LuaRocks website on GitHub workflow
• minor edits in the README:
  • replaced AppVeyor and Travis badges for the GitHub and LuaRocks ones
  • replaced the account keplerproject reference to luarocks

[luau-project]

@Tieske applied your suggestion

[daurnimator]

Anyone know what the process is to do a release for this repo?

[luau-project]

I guess Tieske is waiting for Hisham to move this repo to LunarModules account (see #8), together with the registry on LuaRocks org website