Removes explicit simplecov version from Gemfile
Removes explicit simplecov version from Gemfile

tomnatt/libraries.io,tomnatt/libraries.io,abrophy/libraries.io,librariesio/libraries.io,abrophy/libraries.io,librariesio/libraries.io,librariesio/libraries.io,abrophy/libraries.io,tomnatt/libraries.io,librariesio/libraries.io