Update URLs (#916)

Author: atouchet

README.md

@@ -9,6 +9,6 @@ rust-url
 
 URL library for Rust, based on the [URL Standard](https://url.spec.whatwg.org/).
 
-[Documentation](https://docs.rs/url/)
+[Documentation](https://docs.rs/url)
 
-Please see [UPGRADING.md](https://github.com/servo/rust-url/blob/master/UPGRADING.md) if you are upgrading from a previous version.
+Please see [UPGRADING.md](https://github.com/servo/rust-url/blob/main/UPGRADING.md) if you are upgrading from a previous version.

idna/tests/punycode_tests.json

@@ -1,6 +1,6 @@
 [
 {
-    "description": "These tests are copied from https://github.com/bestiejs/punycode.js/blob/master/tests/tests.js , used under the MIT license.",
+    "description": "These tests are copied from https://github.com/mathiasbynens/punycode.js/blob/main/tests/tests.js , used under the MIT license.",
     "decoded": "",
     "encoded": ""
 },