bump to 0.20-dev
bump to 0.20-dev

rnixx/buildozer,inclement/buildozer,rnixx/buildozer,bob-the-hamster/buildozer,kived/buildozer,kivy/buildozer,rnixx/buildozer,kivy/buildozer,kivy/buildozer,inclement/buildozer,kivy/buildozer,kived/buildozer,dvenkatsagar/buildozer,inclement/buildozer,superalex/buildozer,cbenhagen/buildozer,rnixx/buildozer,inclement/buildozer