Update Gemfile to point to secure rubygems

Use secure source for rubygems.
docs&specs _a.rotate, _a.shuffle, _a.slice
docs&specs _a.transpose, _a.uniq, _a.union
bump ruby
docs for _a.values_at, and _a.equals
adding _s.camel_case
Merge pull request #11 from jastix/patch-1

Update Gemfile to point to secure rubygems
bump ruby
Merge branch 'reloaded'
_a.cmp, replace 'self' with 'arr' in docs
_str.swapcase. docs,spec,perf improvement for
ruby bump