Fix extended syntax characters (#10)

Removes `\` from the extended syntax characters, which is not to spec.

Author: Protryon

src/index.js

@@ -17,7 +17,7 @@
 /* eslint-disable no-use-before-define */
 
 const syntaxCharacters = '^$\\.*+?()[]{}|'.split('');
-const extendedSyntaxCharacters = '^$\\.*+?()[|'.split('');
+const extendedSyntaxCharacters = '^$.*+?()[|'.split('');
 
 const controlEscapeCharacters = 'fnrtv'.split('');
 const controlEscapeCharacterValues = { 'f': '\f'.charCodeAt(0), 'n': '\n'.charCodeAt(0), 'r': '\r'.charCodeAt(0), 't': '\t'.charCodeAt(0), 'v': '\v'.charCodeAt(0) };

test/literal-regexp-expression.js

@@ -160,7 +160,8 @@ suite('Parser', () => {
       /\k/
       /t{5/
       /[💩-💫]/u
-      /[\u{1F4A9}-\u{1F4AB}]/u`);
+      /[\u{1F4A9}-\u{1F4AB}]/u
+      /\c/`);
     const regexToFail = preprocessRegexList(String.raw`/[/
       /(?<=t|v|X|.|$||)/
       /(?<!t|v|X|.|$||)/
@@ -199,7 +200,6 @@ suite('Parser', () => {
       /\c/u
       /\k<X>/u
       /(?<X>)/u
-      /\c/
       /${'\\xZZ'}/u
       /\ud800${'\\uZZ'}/u
       /${'\\uZZ'}/u