Add ruby version checks.
Add ruby version checks.

cocktail-io/github,piotrmurach/github,davengeo/github,peter-murach/github,firstval/github,durai145/github,MalachiTatum/github,GistBox/github,anabhilash619/github,samphilipd/github,yaoxiaoyong/github,wicky-info/github,joshsoftware/github,befairyliu/github