Upgrade elixir to v1.12

[grzuy]

• Fix any compilation warnings coming from this app
• Fix any failing tests
• Check changelog entry

[grzuy]

Test failing because elixir no longer sorts binding, intentionally: elixir-lang/elixir@f0b227d.

I need to update tests so that they don't depend on order or apply sorting in the app if that affects the way they are displayed in the sidebar.

[eldano]

Elixir 1.12 added support for stepped ranges, we need to add support for them.

[grzuy]

Elixir 1.12 added support for stepped ranges, we need to add support for them.

Oh right, I assumed they were going to work out of the box, but you're right. They're not working.
Thanks!

[grzuy]

Allowed.

Still need to figure out how to make the docs for stepped ranges appear given they are a new type of binary operator.

[eldano]

Still need to figure out how to make the docs for stepped ranges appear given they are a new type of binary operator.

Nice! Yeah more like a ternary operator. We need to think where the user should click to get the documentation because the operator is splitted in this case. I don't think we'll find a simple solution so maybe we could leave that outside of the scope of this PR. Wdyt?

[grzuy]

Still need to figure out how to make the docs for stepped ranges appear given they are a new type of binary operator.

Nice! Yeah more like a ternary operator. We need to think where the user should click to get the documentation because the operator is splitted in this case. I don't think we'll find a simple solution so maybe we could leave that outside of the scope of this PR. Wdyt?

Sounds like a good idea to me 👍