Remove unnecessary group by all columns

Signed-off-by: João Soares <jsoaresgeral@gmail.com>
Redirect searches with a single exact match.

When a search results in only a single exact match, redirect to the gem
page instead of showing the search results.
Fetch only the needed field in reverse dependency query
Drop long output version of reverse_dependencies api call
Merge pull request #557 from alup/master

Drop long output version of reverse_dependencies and lighten a query
Merge pull request #531 from jasoares/improve_query

Remove "group by all columns" on Rubygem.with_one_version
Add updated Code Climate badge [ci skip]
Merge pull request #545 from tylivier/exact-match-redirect

Redirect searches with a single exact match
Update diff-lcs dependency to version 1.2.4
Update mime-types dependency to version 1.23
Update raindrops dependency to version 0.11.0
Update bluepill dependency to version 0.0.63
Update pry dependency to version 0.9.12.1