Update rspec-core, fixes #819
Update rspec-core, fixes #819

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