Set Style/RescueStandardError to implicit

[Fryguy]

Most of the code base is already in implicit mode, but rubocop changed
their default to explicit. This moves it back for consistency as well
as my personal preference :)

https://www.rubydoc.info/gems/rubocop/0.52.1/RuboCop/Cop/Style/RescueStandardError

Please vote on what you prefer with 👍 or 👎 on this comment (:+1: means you want implicit like this PR; :-1: means you want explicit as per the rubocop default)

[bdunne]

I think I prefer explicit to encourage people to rescue only the exceptions they are expecting.

[Fryguy]

Strangely, the Ruby Style Guide itself, says that rescue => err is good: https://github.com/bbatsov/ruby-style-guide#no-blind-rescues

There doesn't seem to be an entry in the style guide for this particular cop.

[Fryguy]

Opened an issue on ruby-style-guide about the inconsistency - rubocop/ruby-style-guide#719

[djberg96]

I'm used to implicit, but don't have any objections to making it explicit. Just means lots of cleanup.