fix(dateparser): add new date format for angular 1.5+ only

- Only add parsing ability for new date format for angular 1.5+

Fixes #6349

Author: wesleycho

Diff for: src/dateparser/dateparser.js

@@ -81,12 +81,6 @@ angular.module('ui.bootstrap.dateparser', [])
         apply: function(value) { this.month = value - 1; },
         formatter: function(date) { return dateFilter(date, 'M'); }
       },
-      {
-        key: 'LLLL',
-        regex: $locale.DATETIME_FORMATS.STANDALONEMONTH.join('|'),
-        apply: function(value) { this.month = $locale.DATETIME_FORMATS.STANDALONEMONTH.indexOf(value); },
-        formatter: function(date) { return dateFilter(date, 'LLLL'); }
-      },
       {
         key: 'd!',
         regex: '[0-2]?[0-9]{1}|3[0-1]{1}',
@@ -236,6 +230,15 @@ angular.module('ui.bootstrap.dateparser', [])
         formatter: function(date) { return dateFilter(date, 'G'); }
       }
     ];
+
+    if (angular.version.major >= 1 && angular.version.minor > 4) {
+      formatCodeToRegex.push({
+        key: 'LLLL',
+        regex: $locale.DATETIME_FORMATS.STANDALONEMONTH.join('|'),
+        apply: function(value) { this.month = $locale.DATETIME_FORMATS.STANDALONEMONTH.indexOf(value); },
+        formatter: function(date) { return dateFilter(date, 'LLLL'); }
+      });
+    }
   };
 
   this.init();