Update acts-as-taggable-on 5.0 -> 6.0

Signed-off-by: Rémy Coutable <remy@rymai.me>

Gemfile

@@ -158,7 +158,7 @@ end
 gem 'state_machines-activerecord', '~> 0.5.1'
 
 # Issue tags
-gem 'acts-as-taggable-on', '~> 5.0'
+gem 'acts-as-taggable-on', '~> 6.0'
 
 # Background jobs
 gem 'sidekiq', '~> 5.2.1'

Gemfile.lock

@@ -43,8 +43,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    acts-as-taggable-on (5.0.0)
-      activerecord (>= 4.2.8)
+    acts-as-taggable-on (6.0.0)
+      activerecord (~> 5.0)
     adamantium (0.2.0)
       ice_nine (~> 0.11.0)
       memoizable (~> 0.4.0)
@@ -948,7 +948,7 @@ DEPENDENCIES
   RedCloth (~> 4.3.2)
   ace-rails-ap (~> 4.1.0)
   activerecord_sane_schema_dumper (= 1.0)
-  acts-as-taggable-on (~> 5.0)
+  acts-as-taggable-on (~> 6.0)
   addressable (~> 2.5.2)
   akismet (~> 2.0)
   asana (~> 0.8.1)

lib/gitlab/import_export/import_export.yml

@@ -117,6 +117,7 @@ excluded_attributes:
     - :description_html
     - :repository_languages
     - :bfg_object_map
+    - :tag_list
   namespaces:
     - :runners_token
     - :runners_token_encrypted