Update fix to regex library

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2374

src/lib/regexanalyzer/regex.js

@@ -1022,7 +1022,7 @@ var rnd = function( a, b ){ return Math.round((b-a)*Math.random()+a); },
             if ( isRange && escaped === false && ']' === ch )
             {
                 isRange = false;
-                chars.push('-');
+                chars.push(range[0], '-');
             }
 
             if ( isRange )