fix: word boundaries, no regex lookbehind support for Safari (#1114)

src/utilities/wordBoundariesRegex.ts

@@ -2,7 +2,7 @@ export default (input: string): RegExp => {
   const words = input.split(' ');
 
   // Regex word boundaries that work for cyrillic characters - https://stackoverflow.com/a/47062016/1717697
-  const wordBoundaryBefore = '(?:(?<=[^\\p{L}\\p{N}])|^)';
+  const wordBoundaryBefore = '(?:(?:[^\\p{L}\\p{N}])|^)'; // Converted to a non-matching group instead of positive lookbehind for Safari
   const wordBoundaryAfter = '(?=[^\\p{L}\\p{N}]|$)';
 
   const regex = words.reduce((pattern, word, i) => {