Bump asana to ~> 0.4.0

Closes #2830

Gemfile

@@ -153,7 +153,7 @@ gem "gemnasium-gitlab-service", "~> 0.2"
 gem "slack-notifier", "~> 1.2.0"
 
 # Asana integration
-gem 'asana', '~> 0.0.6'
+gem 'asana', '~> 0.4.0'
 
 # FogBugz integration
 gem 'ruby-fogbugz', '~> 0.2.1'

Gemfile.lock

@@ -29,10 +29,6 @@ GEM
       actionpack (>= 4.0.0, < 5)
       activerecord (>= 4.0.0, < 5)
       railties (>= 4.0.0, < 5)
-    activeresource (4.0.0)
-      activemodel (~> 4.0)
-      activesupport (~> 4.0)
-      rails-observers (~> 0.1.1)
     activesupport (4.1.14)
       i18n (~> 0.6, >= 0.6.9)
       json (~> 1.7, >= 1.7.7)
@@ -48,8 +44,11 @@ GEM
       activerecord (>= 3.2, <= 4.3)
       rake (~> 10.4)
     arel (5.0.1.20140414130214)
-    asana (0.0.6)
-      activeresource (>= 3.2.3)
+    asana (0.4.0)
+      faraday (~> 0.9)
+      faraday_middleware (~> 0.9)
+      faraday_middleware-multi_json (~> 0.0)
+      oauth2 (~> 1.0)
     asciidoctor (1.5.2)
     ast (2.1.0)
     astrolabe (1.3.1)
@@ -191,6 +190,9 @@ GEM
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.10.0)
       faraday (>= 0.7.4, < 0.10)
+    faraday_middleware-multi_json (0.0.6)
+      faraday_middleware
+      multi_json
     fastercsv (1.5.5)
     ffaker (2.0.0)
     ffi (1.9.10)
@@ -523,8 +525,6 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.1.14)
       sprockets-rails (~> 2.0)
-    rails-observers (0.1.2)
-      activemodel (~> 4.0)
     railties (4.1.14)
       actionpack (= 4.1.14)
       activesupport (= 4.1.14)
@@ -795,7 +795,7 @@ DEPENDENCIES
   addressable (~> 2.3.8)
   after_commit_queue
   annotate (~> 2.6.0)
-  asana (~> 0.0.6)
+  asana (~> 0.4.0)
   asciidoctor (~> 1.5.2)
   attr_encrypted (~> 1.3.4)
   awesome_print (~> 1.2.0)