Doesn't build on stable

[richardeoin]

Currently nightly is required for type_alias_enum_variants.

type_alias_enum_variants

Tracking issue
Stabilisation PR

[jordens]

Stabilized in rust-lang/rust@5748825. Will appear in Rust 1.37.0

[jordens]

Now that there is a 1.37 beta we can use that in CI.

[richardeoin]

Rust 1.37.0 stable was released on 15th August 2019