message: Updated travis install script.
  Travis install script updated after new release build published.
diff: #!/bin/bash
  -curl -sL https://github.com/xd009642/tarpaulin/releases/download/0.3.11/cargo-tarpaulin-0.3.11-travis.tar.gz | tar xvz -C $HOME/.cargo/bin
  +curl -sL https://github.com/xd009642/tarpaulin/releases/download/0.3.12/cargo-tarpaulin-0.3.12-travis.tar.gz | tar xvz -C $HOME/.cargo/bin
  