update to 0.0.31 upstream version
    
    - Resolves: rhbz#968209 - Typing characters which are not explicitly listed as “valid_input_chars” in .conf files in ibus-typing-booster get inserted in a weird position
    - Remove lots of unused and/or useless code
    - Simplify some code
    - Fix the problem that after “page down” the first “arrow down” does not move down in the lookup table
    - Never use “-” or “=” as page up and page down keys
    - Print more useful debug output when an exception happens
    - Replace unencodable characters when asking pyhunspell for suggestions
    - Get dictionary encoding from .aff file
    - Get rid of the the variable “valid_input_chars” (https://bugzilla.redhat.com/show_bug.cgi?id=968209)
    - Remove option “valid_input_chars” from .conf files and template.txt
    - Replace keysym2unichr(key.code) with IBus.keyval_to_unicode(key.code)