clap 2.31.2

A simple to use, efficient, and full featured Command Line Argument Parser
Documentation
environment:
  matrix:
  - TARGET: x86_64-pc-windows-msvc
  - TARGET: i686-pc-windows-msvc
  - TARGET: x86_64-pc-windows-gnu
  - TARGET: i686-pc-windows-gnu
  RUST_BACKTRACE: full
install:
  - curl -sSf -o rustup-init.exe https://win.rustup.rs/
  - rustup-init.exe -y --default-host %TARGET%
  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
  - rustc -vV
  - cargo -vV
build: false
test_script:
  - cargo build --verbose --features yaml
  - cargo test --verbose --features yaml