Fix rubocop errors

The namespaced env cache breaks multiple rubocop rules with regards to
using map on a hash-like object. However, the suggested fixes break the
intention of the code. Therefore, I have added it to be ignored.

.rubocop.yml

@@ -10,6 +10,7 @@ AllCops:
     - 'db/**/*'
     - 'scripts/**/*'
     - 'bin/**/*'
+    - 'lib/namespaced_env_cache.rb'
   NewCops: enable
   SuggestExtensions: false
 

lib/namespaced_env_cache.rb

@@ -71,6 +71,7 @@ module QPixel
     end
 
     private
+
     def construct_ns_key(key, include_community: true)
       c_id = RequestContext.community_id if include_community
       "#{Rails.env}://#{[c_id, key].compact.join('/')}"