message: Update install script following release
diff: #!/bin/bash
  -curl -sL https://github.com/xd009642/tarpaulin/releases/download/0.4.1/cargo-tarpaulin-0.4.1-travis.tar.gz | tar xvz -C $HOME/.cargo/bin
  +curl -sL https://github.com/xd009642/tarpaulin/releases/download/0.4.2/cargo-tarpaulin-0.4.2-travis.tar.gz | tar xvz -C $HOME/.cargo/bin
  