Resolve regression of #43.

By turning the InterlanguageMap into a normal Map, I also removed its enforcing of https:// everywhere.

package.json

@@ -1,6 +1,6 @@
 {
     "name": "interlanguage-checker",
-    "version": "1.13.1",
+    "version": "1.13.2",
     "description": "Check the consistency of MediaWiki interlanguage links in a simple overview.",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",

src/main/js/MediaWiki.ts

@@ -335,7 +335,7 @@ export class MediaWiki {
      * @param apiUrl the url to the `api.php` file
      */
     constructor(apiUrl: string) {
-        const urlObj = new URL(apiUrl);
+        const urlObj = new URL(apiUrl.replace("http://", "https://"));
         this.origin = urlObj.origin;
         this.apiPath = urlObj.pathname;
     }