Addresses security vulnerabilities identified by Github

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    gov_uk_date_fields (2.1.1)
+    gov_uk_date_fields (2.2.0)
       rails (>= 5.0)
 
 GEM
@@ -51,20 +51,20 @@ GEM
     byebug (10.0.2)
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
+    crass (1.0.4)
     erubis (2.7.0)
-    globalid (0.4.0)
+    globalid (0.4.1)
       activesupport (>= 4.2.0)
     i18n (0.8.1)
-    loofah (2.0.3)
+    loofah (2.2.2)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.6.4)
-      mime-types (>= 1.16, < 4)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
     metaclass (0.0.4)
     method_source (0.8.2)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
+    mini_mime (1.0.0)
+    mini_portile2 (2.3.0)
     minitest (5.10.1)
     minitest-reporters (1.1.7)
       ansi
@@ -73,9 +73,9 @@ GEM
       ruby-progressbar
     mocha (1.1.0)
       metaclass (~> 0.0.1)
-    nio4r (2.0.0)
-    nokogiri (1.7.1)
-      mini_portile2 (~> 2.1.0)
+    nio4r (2.3.0)
+    nokogiri (1.8.2)
+      mini_portile2 (~> 2.3.0)
     pg (0.18.4)
     pry (0.11.0)
       coderay (~> 1.1.0)
@@ -105,30 +105,30 @@ GEM
     rails-dom-testing (2.0.2)
       activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.0.4)
+      loofah (~> 2.2, >= 2.2.2)
     railties (5.0.2)
       actionpack (= 5.0.2)
       activesupport (= 5.0.2)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (12.0.0)
+    rake (12.3.1)
     ruby-progressbar (1.8.1)
     sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.0)
+    sprockets-rails (3.2.1)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    thor (0.19.4)
+    thor (0.20.0)
     thread_safe (0.3.6)
     tzinfo (1.2.3)
       thread_safe (~> 0.1)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.2)
+    websocket-extensions (0.1.3)
 
 PLATFORMS
   ruby

lib/gov_uk_date_fields/version.rb

@@ -1,3 +1,3 @@
 module GovUkDateFields
-  VERSION = "2.1.1"
+  VERSION = "2.2.0"
 end