Build fails for latest nightly

[NikVolf]

Build fails with the latest rust nightly

Probably breaking changes for aster lib
work in progress
serde-deprecated/aster#65

changes
rust-lang/rust#31487

[mseri]

Not just those.

Even after fixing docopt_macros (see docopt/docopt.rs#169) there is another issue with jsonrpc-core (see https://github.com/debris/jsonrpc-core/issues/4)

[kirushik]

@NikVolf I'm updating your branch in #426 — it finally builds, please merge at will.

[NikVolf]

serde-deprecated/quasi#32

• fixed

[NikVolf]

serde-deprecated/aster#66

• fixed

[NikVolf]

serde_codegen fails (used in json-rpc)
serde-rs/serde#235

• fixed

[debris]

serde-rs/serde#236

• fixed (merged, but not released yet)

[NikVolf]

It is building now with cargo build --release
don't forget cargo update to update dependencies (before build)

[kirushik]

@NikVolf Awesome work, thank you very much!