update js_regex version

Gemfile

@@ -187,7 +187,7 @@ gem 're2', '~> 1.1.1'
 gem 'version_sorter', '~> 2.1.0'
 
 # Export Ruby Regex to Javascript
-gem 'js_regex', '~> 2.2.1'
+gem 'js_regex', '~> 3.1'
 
 # User agent parsing
 gem 'device_detector'

Gemfile.lock

@@ -113,6 +113,7 @@ GEM
       activesupport (>= 4.0.0)
       mime-types (>= 1.16)
     cause (0.1)
+    character_set (1.1.2)
     charlock_holmes (0.7.6)
     childprocess (0.9.0)
       ffi (~> 1.0, >= 1.0.11)
@@ -394,8 +395,10 @@ GEM
       multipart-post
       oauth (~> 0.5, >= 0.5.0)
     jquery-atwho-rails (1.3.2)
-    js_regex (2.2.1)
-      regexp_parser (>= 0.4.11, <= 0.5.0)
+    js_regex (3.1.1)
+      character_set (~> 1.1)
+      regexp_parser (~> 1.1)
+      regexp_property_values (~> 0.3)
     json (1.8.6)
     json-jwt (1.9.4)
       activesupport
@@ -693,7 +696,8 @@ GEM
       redis-store (>= 1.2, < 2)
     redis-store (1.6.0)
       redis (>= 2.2, < 5)
-    regexp_parser (0.5.0)
+    regexp_parser (1.3.0)
+    regexp_property_values (0.3.4)
     representable (3.0.4)
       declarative (< 0.1.0)
       declarative-option (< 0.2.0)
@@ -1039,7 +1043,7 @@ DEPENDENCIES
   influxdb (~> 0.2)
   jira-ruby (~> 1.4)
   jquery-atwho-rails (~> 1.3.2)
-  js_regex (~> 2.2.1)
+  js_regex (~> 3.1)
   json-schema (~> 2.8.0)
   jwt (~> 2.1.0)
   kaminari (~> 1.0)