conftest: Check if coverage is installed
conftest: Check if coverage is installed

Earlier, when pytest-cov is not installed an error used to show
after pytest was run. This ensures that doesn't happen anymore.

damngamerz/coala,Nosferatul/coala,abhiroyg/coala,aptrishu/coala,d6e/coala,saurabhiiit/coala,karansingh1559/coala,NalinG/coala,sils1297/coala,AbdealiJK/coala,tushar-rishav/coala,MariosPanag/coala,scottbelden/coala,Asalle/coala,ayushin78/coala,AdeshAtole/coala,nemaniarjun/coala,djkonro/coala,refeed/coala,sophiavanvalkenburg/coala,NiklasMM/coala,CruiseDevice/coala,impmihai/coala,shreyans800755/coala,sagark123/coala,incorrectusername/coala,rimacone/testing2,incorrectusername/coala,mr-karan/coala,sils1297/coala,svsn2117/coala,coala-analyzer/coala,tltuan/coala,dagdaggo/coala,Asalle/coala,d6e/coala,nemaniarjun/coala,karansingh1559/coala,NalinG/coala,jayvdb/coala,saurabhiiit/coala,abhiroyg/coala,arafsheikh/coala,damngamerz/coala,kartikeys98/coala,svsn2117/coala,lonewolf07/coala,Nosferatul/coala,kartikeys98/coala,MattAllmendinger/coala,coala/coala,Uran198/coala,RJ722/coala,sils1297/coala,SanketDG/coala,netman92/coala,sagark123/coala,Nosferatul/coala,netman92/coala,stevemontana1980/coala,NiklasMM/coala,ManjiriBirajdar/coala,Shade5/coala,arjunsinghy96/coala,Uran198/coala,NalinG/coala,nemaniarjun/coala,JohnS-01/coala,stevemontana1980/coala,shreyans800755/coala,NiklasMM/coala,AdeshAtole/coala,MariosPanag/coala,damngamerz/coala,JohnS-01/coala,rimacone/testing2,yashLadha/coala,tltuan/coala,scottbelden/coala,lonewolf07/coala,yashLadha/coala,MariosPanag/coala,swatilodha/coala,coala/coala,arush0311/coala,coala-analyzer/coala,vinc456/coala,MattAllmendinger/coala,karansingh1559/coala,rimacone/testing2,sagark123/coala,ayushin78/coala,yland/coala,arush0311/coala,aptrishu/coala,CruiseDevice/coala,arafsheikh/coala,netman92/coala,incorrectusername/coala,ManjiriBirajdar/coala,JohnS-01/coala,rresol/coala,MattAllmendinger/coala,tushar-rishav/coala,djkonro/coala,aptrishu/coala,AbdealiJK/coala,sophiavanvalkenburg/coala,sudheesh001/coala,AbdealiJK/coala,ayushin78/coala,saurabhiiit/coala,Uran198/coala,NalinG/coala,dagdaggo/coala,meetmangukiya/coala,NalinG/coala,abhiroyg/coala,Asalle/coala,refeed/coala,stevemontana1980/coala,Shade5/coala,tushar-rishav/coala,sudheesh001/coala,SanketDG/coala,AdeshAtole/coala,Asnelchristian/coala,yashtrivedi96/coala,rresol/coala,refeed/coala,kartikeys98/coala,SanketDG/coala,sophiavanvalkenburg/coala,dagdaggo/coala,jayvdb/coala,NalinG/coala,d6e/coala,vinc456/coala,mr-karan/coala,svsn2117/coala,Balaji2198/coala,jayvdb/coala,Asnelchristian/coala,Balaji2198/coala,lonewolf07/coala,arjunsinghy96/coala,ManjiriBirajdar/coala,sudheesh001/coala,rresol/coala,coala-analyzer/coala,RJ722/coala,NalinG/coala,impmihai/coala,yland/coala,shreyans800755/coala,Shade5/coala,mr-karan/coala,tltuan/coala,djkonro/coala,swatilodha/coala,scottbelden/coala,Balaji2198/coala,vinc456/coala,RJ722/coala,yland/coala,meetmangukiya/coala,coala/coala,yashtrivedi96/coala,arush0311/coala,arjunsinghy96/coala,yashtrivedi96/coala,CruiseDevice/coala,arafsheikh/coala,yashLadha/coala,Asnelchristian/coala,swatilodha/coala,impmihai/coala,meetmangukiya/coala