Get current state ready to publish on hex.pm

[oubiwann]

Tasks:

• Add rebar.config
• Ensure the project builds with the supported versions of LFE and Erlang
• Ensure Erlang spell1 works as expected/it used to
• Ensure LFE spell1 works as expected/it used to
• Update README with references to supported versions of Erlang and LFE
• Add tests
• Add make targets for running the tests
  • ensure project is compiled
  • ensure testing *.spell1 files get parsed and compiled
  • ensure that when the tests run, rebar3 is able to see the .erl files compiled from the *.spell1 files
• Update it to use GH Actions for CI/CD

[rvirding]

@oubiwann I have been looking at this as I was thinking of modifying the LFE syntax, only internally and it wouldn't be noticed. I then realised that I couldn't compile it as yeccscan interface had changed. I am working on that and have fixed it. While along the way I am working on the other points. I will soon release 0.3 on develop so it can actually be used and tested.

[oubiwann]

@rvirding That's sounds great!

I did make some progress here in a local branch, but had to put in on pause -- I'll take a look once you release 0.3!

[rvirding]

@oubiwann Yes, I am looking through your branch and plucking ideas from it. Btw there is now a spell1 discord server. I think I sent you an invite otherwise you can use https://discord.gg/nu5kFuXH