Implement link matcher priorities

Fixes #549

src/Types.ts

@@ -2,5 +2,13 @@
  * @license MIT
  */
 
+export type LinkMatcher = {
+  id: number,
+  regex: RegExp,
+  handler: LinkMatcherHandler,
+  matchIndex?: number,
+  validationCallback?: LinkMatcherValidationCallback,
+  priority?: number
+};
 export type LinkMatcherHandler = (uri: string) => void;
 export type LinkMatcherValidationCallback = (uri: string, callback: (isValid: boolean) => void) => void;