update to 1.4.4
    
    - self._current_imes needs to be updated before self.init_transliterators()
    - Resolves: rhbz#1334579
    - typing-booster.appdata.xml is now included and installed from the tarball
    - libtranslit is not required anymore (neither for building nor at runtime)
      but m17n-lib is required at runtime.