Add .coveragerc to avoid reporting exernal test coverage
Add .coveragerc to avoid reporting exernal test coverage

mclevey/seaborn,lukauskas/seaborn,tim777z/seaborn,huongttlan/seaborn,oesteban/seaborn,lukauskas/seaborn,lypzln/seaborn,sauliusl/seaborn,Lx37/seaborn,jat255/seaborn,mwaskom/seaborn,phobson/seaborn,JWarmenhoven/seaborn,bsipocz/seaborn,anntzer/seaborn,gef756/seaborn,drewokane/seaborn,phobson/seaborn,sinhrks/seaborn,Guokr1991/seaborn,arokem/seaborn,q1ang/seaborn,petebachant/seaborn,nileracecrew/seaborn,mia1rab/seaborn,dhimmel/seaborn,wrobstory/seaborn,ebothmann/seaborn,arokem/seaborn,aashish24/seaborn,cwu2011/seaborn,ashhher3/seaborn,kyleam/seaborn,aashish24/seaborn,clarkfitzg/seaborn,jakevdp/seaborn,parantapa/seaborn,anntzer/seaborn,dotsdl/seaborn,yarikoptic/seaborn,dimarkov/seaborn,olgabot/seaborn,mwaskom/seaborn,ischwabacher/seaborn,muku42/seaborn,uhjish/seaborn