Bump gon from 5.2.3 to 6.4.0

Bumps [gon](https://github.com/gazay/gon) from 5.2.3 to 6.4.0.
- [Release notes](https://github.com/gazay/gon/releases)
- [Changelog](https://github.com/gazay/gon/blob/master/CHANGELOG.md)
- [Commits](gazay/gon@v5.2.3...v6.4.0)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -22,7 +22,7 @@ gem 'omniauth-facebook', '~> 2.0.1'
 gem 'omniauth-google-oauth2', '~> 0.2.6'
 gem 'cancancan', '~> 2.2.0'
 gem 'simple_form', '~> 5.0.1'
-gem 'gon', '~> 5.2.3'
+gem 'gon', '~> 6.4.0'
 gem 'kaminari', '~> 0.16.1'
 gem 'email_validator', '~> 1.4.0'
 gem 'recipient_interceptor', '~> 0.1.2'

Gemfile.lock

@@ -124,7 +124,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.8)
     crass (1.0.6)
     dalli (2.7.8)
     database_cleaner (1.3.0)
@@ -156,7 +156,7 @@ GEM
       activemodel
     enumerize (2.2.2)
       activesupport (>= 3.2)
-    erubi (1.9.0)
+    erubi (1.10.0)
     erubis (2.7.0)
     eventmachine (1.2.7)
     excon (0.62.0)
@@ -181,11 +181,11 @@ GEM
       multi_json (>= 1.11.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    gon (5.2.3)
-      actionpack (>= 2.3.0)
-      json
+    gon (6.4.0)
+      actionpack (>= 3.0.20)
+      i18n (>= 0.7)
       multi_json
-      request_store (>= 1.0.5)
+      request_store (>= 1.0)
     google_maps_service (0.4.2)
       hurley (~> 0.1)
       multi_json (~> 1.11)
@@ -222,7 +222,7 @@ GEM
     hitimes (1.3.0)
     http_parser.rb (0.6.0)
     hurley (0.2)
-    i18n (1.8.2)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
     i18n-tasks (0.9.21)
       activesupport (>= 4.0.2)
@@ -241,7 +241,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.6)
+    json (2.5.1)
     jwt (1.5.6)
     kaminari (0.16.3)
       actionpack (>= 3.0.0)
@@ -257,7 +257,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.4.0)
+    loofah (2.9.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.13)
@@ -269,12 +269,14 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.14.0)
+    mini_portile2 (2.5.1)
+    minitest (5.14.4)
     moneta (0.8.1)
-    multi_json (1.13.1)
+    multi_json (1.15.0)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
     neat (1.7.4)
@@ -284,8 +286,9 @@ GEM
     net-http-persistent (2.9.4)
     newrelic_rpm (5.2.0.345)
     nio4r (2.5.2)
-    nokogiri (1.10.7)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.3)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -339,7 +342,8 @@ GEM
     public_suffix (3.0.2)
     puma (4.1.0)
       nio4r (~> 2.0)
-    rack (2.1.1)
+    racc (1.5.2)
+    rack (2.2.3)
     rack-cors (1.0.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -387,7 +391,7 @@ GEM
     recipient_interceptor (0.1.2)
       mail
     redcarpet (3.3.4)
-    request_store (1.4.1)
+    request_store (1.5.0)
       rack (>= 1.4)
     responders (3.0.0)
       actionpack (>= 5.0)
@@ -491,7 +495,7 @@ GEM
       rails (>= 3.1)
     turbolinks (2.5.4)
       coffee-rails
-    tzinfo (1.2.6)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (4.1.12)
       execjs (>= 0.3.0, < 3)
@@ -541,7 +545,7 @@ DEPENDENCIES
   flutie (~> 2.0.0)
   font-awesome-rails (~> 4.7.0.3)
   gibbon (~> 3.2.0)
-  gon (~> 5.2.3)
+  gon (~> 6.4.0)
   google_maps_service
   guard-livereload
   guard-rspec