Add newline to UTFSequence

Summary:
Changelog:
[General][Added] - Added newline to UTFSequence

Reviewed By: bvanderhoof

Differential Revision: D42614321

fbshipit-source-id: 50af9815af9d2f57de1b216b4adf05bea6c4ad46

Author: Devon Mars

Libraries/UTFSequence.js

@@ -31,6 +31,7 @@ const UTFSequence: {|
   NBSP: string,
   NDASH: string,
   NDASH_SP: string,
+  NEWLINE: string,
   PIZZA: string,
   TRIANGLE_LEFT: string,
   TRIANGLE_RIGHT: string,
@@ -45,6 +46,7 @@ const UTFSequence: {|
   MDASH_SP: '\u00A0\u2014\u00A0', //  — 
   NDASH: '\u2013', // en dash: –
   NDASH_SP: '\u00A0\u2013\u00A0', //  – 
+  NEWLINE: '\u000A',
   NBSP: '\u00A0', // non-breaking space:  
   PIZZA: '\uD83C\uDF55',
   TRIANGLE_LEFT: '\u25c0', // black left-pointing triangle