Update Rubocop to version 0.37.2
Update Rubocop to version 0.37.2

**Why**:
The current version used by Hound (0.37.0) contains a bug with the RedundantMerge cop that causes a false positive when calling `update` on ActiveRecord objects. See https://github.com/bbatsov/rubocop/issues/2781

**How**:
Update to 0.37.1 or higher, which fixes the issue.

q-centrix/hound,houndci/hound,q-centrix/hound,brgaulin/hound,brgaulin/hound,houndci/hound,thoughtbot/hound,houndci/hound,platanus/hound,brgaulin/hound,q-centrix/hound,brgaulin/hound,platanus/hound,q-centrix/hound,houndci/hound,thoughtbot/hound,platanus/hound,thoughtbot/hound,platanus/hound,thoughtbot/hound