Repository link missing from docs.rs and crates.io

[jbg]

As of now, there's no link from crates.io or docs.rs back to this repository, presumably because the field is missing from Cargo.toml.

[jyn514]

This seems to have been fixed:

memcache-async/Cargo.toml

Line 10 in b72b6b8

repository = "https://github.com/vavrusa/memcache-async"