message: Fix windows tagged builds
  The windows tagged builds currently fail some tests since the
  winpty-agent.exe is inside the release directory instead of the debug
  directory with tagged builds.
diff: @@ -20,7 +20,12 @@ cargo test -p font || error=true
  # Test the winpty subcrate
  if [ "$TRAVIS_OS_NAME" == "windows" ]; then
  - cp ./target/debug/winpty-agent.exe ./target/debug/deps && \
  + if [ -n "$TRAVIS_TAG" ]; then
  + mkdir -p "./target/debug/deps"
  + cp "./target/release/winpty-agent.exe" "./target/debug/deps"
  + else
  + cp "./target/debug/winpty-agent.exe" "./target/debug/deps"
  + fi
  cargo test -p winpty || error=true
  fi
  