A few updates

[nathany-copia]

Thanks for the library. Here are a few little cleanups and updates.

• fix use Mix.Config deprecation, requires Elixir 1.9+
• Update dependencies
• Update Travis CI version to the last 2 versions switch to GitHub Actions with latest Erlang/Elixir
• Add standard mix format config
• Fix deprecation with single-quoted strings represent charlists. Use ~c"" if you indeed want a charlist or use "" instead (I assumed these are all charlists -- please correct me if I'm wrong)
• Include convert dest_path to chatlist when unzip #129 to fix Regression in Erlang OTP 27.1 #128 in Erlang 27.1

I refrained from committing all the mix format changes, as that can make review difficult, and you may want to tweak line-length or other settings beforehand.

[nathany-copia]

Some more updates today

[nathany-copia]

Still need a fix for #130 before Erlang 27.1 is fully supported.

[nathany-copia]

With Erlang 27.1.1, everything is working well with this branch.

[vheathen]

@jsonkenl could you please have a look at the PR?