[Feature] Email collect message hooks (#331)

- Add email collect hook on creating conversation
- Merge contact if it already exist

.rubocop.yml

@@ -4,13 +4,13 @@ require:
   - rubocop-rspec
 inherit_from: .rubocop_todo.yml
 
-Metrics/LineLength:
+Layout/LineLength:
   Max: 150
 Metrics/ClassLength:
   Max: 125
 RSpec/ExampleLength:
   Max: 15
-Documentation:
+Style/Documentation:
   Enabled: false
 Style/FrozenStringLiteralComment:
   Enabled: false