chore(dateRange): Updating changelog

Author: Ivan Kitanov

CHANGELOG.md

@@ -2,6 +2,17 @@
 
 All notable changes for each version of this project will be documented in this file.
 
+## Unreleased
+### New Features
+- `IgxDateRangePicker`
+ - Added new properties:
+  - `usePredefinedRanges` - Whether to render built-in predefined ranges 
+  - `customRanges` - Allows the user to provide custom ranges rendered as chips
+  - `resourceStrings` - Allows the user to provide set of resource strings 
+        
+- `IgxPredefinedRangesAreaComponent`
+  - Added new component for rendering the predefined or custom ranges inside the calendar of the `IgxDateRangePicker`
+
 ## 20.1.0
 ### New Features
 - `IgxCarousel`