added coverage to requirements
added coverage to requirements

decebel/librosa,stefan-balke/librosa,r9y9/librosa,Cortexelus/librosa,ruohoruotsi/librosa,r9y9/librosa,Cortexelus/librosa,ruohoruotsi/librosa,decebel/librosa,Cortexelus/librosa,craffel/librosa,yunque/librosa,imsparsh/librosa,stefan-balke/librosa,craffel/librosa,r9y9/librosa,yunque/librosa,imsparsh/librosa,carlthome/librosa,craffel/librosa,carlthome/librosa,carlthome/librosa,stefan-balke/librosa,ruohoruotsi/librosa