Log Message:
fonts/cantarell-fonts: update to 0.303

v0.303
- Actually update the version number in the fonts. D'oh.

v0.302
- Maintenance release: Make the variable font the default, only build
  statics on demand. Also build two packages with variable and static
  fonts. Packagers can chose the statics package if they run into
  problems with the variable font, but you should probably not install
  both at the same time.
- Amended OS/2 super- and subscript values so that new Pango can use
  them properly.
- Update production names for Jacute, bulletoperator,
  commercialMinusSign, divisionslash, notidentical, ringcomb_acutecomb
  and ringcomb_acutecomb.case.
- New appstream translations:
  - Belarusian by Alexey Razumov
  - Updated Portuguese by Hugo Carvalho
  - Bulgarian by Alexander Shopov