Use URLSearchParams instead of transitive dependency querystring

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

test/unit-tests/url_utils-test.ts

@@ -0,0 +1,42 @@
+/*
+Copyright 2020 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {parseQsFromFragment, parseQs} from "../../src/vector/url_utils";
+
+describe("url_utils.ts", function() {
+    // @ts-ignore
+    const location: Location = {
+        hash: "",
+        search: "",
+    };
+
+    it("parseQsFromFragment", function() {
+        location.hash = "/home?foo=bar";
+        expect(parseQsFromFragment(location)).toEqual({
+            location: "home",
+            params: {
+                "foo": "bar",
+            },
+        });
+    });
+
+    describe("parseQs", function() {
+        location.search = "?foo=bar";
+        expect(parseQs(location)).toEqual({
+            "foo": "bar",
+        });
+    });
+});