rtmidi-3.0.0-bp150.2.4

- Update to version 3.0.0
  * The version number has been bumped to 3.0.0 because of the
    past API change concerning the renaming of the RtError class
    to RtMidiError. Changes in this release include:
    + see git history for complete list of changes
    + new sendMessage() function that does not use std::vector
    + various std::string updates, including use of UTF8 for port
    names
    + fixes for the MIDI queue
    + various build system updates and code efficiencies
- Spec cleanup

- Change path to headers
- Drop _service file

- Update to version 2.1.1
  * update pkgconfig.patch

- Initial release