Installing cocoapods gives the following error:
:~$ sudo gem install cocoapods
Fetching: nap-1.1.0.gem (100%)
Fetching: fuzzy_match-2.0.4.gem (100%)
Fetching: cocoapods-core-1.2.1.gem (100%)
ERROR: Error installing cocoapods:
cocoapods-core requires Ruby version >= 2.0.0.