Optimized SimpleTokenizer RegExp

Author: Brian Vaughn

source/StopWordsMap.js

@@ -3,7 +3,7 @@
 /**
  * Stop words list copied from Lunr JS.
  */
-export const StopWordsMap = {
+export var StopWordsMap = {
   a: 'a',
   able: 'able',
   about: 'about',

source/Tokenizer/SimpleTokenizer.js

@@ -2,7 +2,7 @@
 
 import type { ITokenizer } from './Tokenizer';
 
-const REGEX = /[^a-zа-яё0-9\-\u00000']+/i;
+var REGEX = /[^a-zа-яё0-9\-']+/i;
 
 /**
  * Simple tokenizer that splits strings on whitespace characters and returns an array of all non-empty substrings.