allow using custom regexes

Author: bjoveski

index.d.ts

@@ -18,6 +18,8 @@ declare module "node-email-reply-parser" {
   }
   type ReplyParserRegular = (emailContent: string) => Email;
   type ReplyParserVisibleTextOnly = (emailContent: string, visibleTextOnly: true) => string;
-  const replyParser: ReplyParserRegular & ReplyParserVisibleTextOnly;
+  type ReplyParserWithOptions = (emailContent: string, visibleTextOnly: boolean, options: { signatureRegex?: RegExp; quotedLineRegex?: RegExp; quoteHeadersRegex?: RegExp[] }) => Email;
+  
+  const replyParser: ReplyParserRegular & ReplyParserVisibleTextOnly & ReplyParserWithOptions;
   export = replyParser;
 }

index.js

@@ -9,10 +9,14 @@ var Parser = require("./lib/Parser");
  * Parses the given text into an email
  * @param {string} text the email text to parse
  * @param {boolean} [visibleTextOnly] if true, the visible text will be returned instead of an Email
+ * @param {object} [options] the options to pass to the parser
+ * @param {RegExp} [options.signatureRegex] the regular expression used to match signatures
+ * @param {RegExp} [options.quotedLineRegex] the regular expression used to match quoted lines
+ * @param {RegExp[]} [options.quoteHeadersRegex] the regular expressions used to find quoted sections based on the header
  * @returns {Email|string} the parsed Email or visible text, depending on the second argument
  */
-function parse(text, visibleTextOnly) {
-    var parser = new Parser();
+function parse(text, visibleTextOnly, options) {
+    var parser = new Parser(options?.signatureRegex, options?.quotedLineRegex, options?.quoteHeadersRegex);
     var email = parser.parse(text);
 
     if (visibleTextOnly) {