cargo_toml 0.11.6

`Cargo.toml` struct definitions for parsing with Serde
Documentation 
.cargo_test_template:
  stage: test
  script:
    - cargo test --verbose

stages:
  - test

stable:cargo:
  extends: .cargo_test_template
  image: rustdocker/rust:stable

beta:cargo:
  extends: .cargo_test_template
  image: rustdocker/rust:beta

nightly:cargo:
  extends: .cargo_test_template
  image: rustdocker/rust:nightly