Improve TypeScript types

- correctly type normalization options
- correctly type parsed url
- add type tests via tsd
- add types for ES6 module export

index.d.mts

@@ -0,0 +1,7 @@
+import parseUrl = require("./index");
+
+export type ParsedUrl = parseUrl.ParsedUrl;
+export type NormalizeOptions = parseUrl.NormalizeOptions;
+export type ParsingError = parseUrl.ParsingError;
+
+export default parseUrl;

index.d.ts

@@ -1,18 +1,21 @@
-declare interface ParsedUrl {
-    protocols: string[];
-    protocol: string;
-    port?: string;
-    resource: string;
-    user: string;
-    pathname: string;
-    hash: string;
-    search: string;
-    href: string;
-    query: {
-        [key: string]: any;
-    }
+import parsePath = require("parse-path");
+import normalizeUrl = require("normalize-url");
+
+declare namespace parseUrl {
+  const MAX_INPUT_LENGTH: 2048;
+
+  type NormalizeOptions = normalizeUrl.Options;
+
+  type ParsedUrl = parsePath.ParsedPath;
+
+  interface ParsingError extends Error {
+    readonly subject_url: string;
+  }
 }
 
-declare function parseUrl(url: string, normalize?: boolean | Object): ParsedUrl;
+declare function parseUrl(
+  url: string,
+  normalize?: boolean | parseUrl.NormalizeOptions
+): parseUrl.ParsedUrl;
 
-export = parseUrl
+export = parseUrl;