Add analyzer_rule

Author: Tomusm

SwiftLint/swiftlint.yml

@@ -61,7 +61,6 @@ opt_in_rules:
   - contains_over_first_not_nil
   - empty_collection_literal
   - empty_string
-  - explicit_self
   - file_name
   - for_where
   - joined_default_parameter
@@ -83,6 +82,10 @@ opt_in_rules:
   - single_test_class
   - strong_iboutlet
 
+analyzer_rules: # Rules run by `swiftlint analyze` (experimental)
+  - explicit_self
+  - unused_import
+
 # rule parameters
 file_length:
   warning: 600