Update TypeScript to 4.1.1-rc

DISABLE_THIRD_PARTY_CHECK="TypeScript update"

R=tvanderlippe@chromium.org

Bug: chromium:1145510
Change-Id: I79473360bc94087d19b5b88091f6255d490c1485
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2517570
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
diff --git a/node_modules/node-fetch/browser.js b/node_modules/node-fetch/browser.js
new file mode 100644
index 0000000..83c54c5
--- /dev/null
+++ b/node_modules/node-fetch/browser.js
@@ -0,0 +1,25 @@
+"use strict";
+
+// ref: https://github.com/tc39/proposal-global
+var getGlobal = function () {
+	// the only reliable means to get the global object is
+	// `Function('return this')()`
+	// However, this causes CSP violations in Chrome apps.
+	if (typeof self !== 'undefined') { return self; }
+	if (typeof window !== 'undefined') { return window; }
+	if (typeof global !== 'undefined') { return global; }
+	throw new Error('unable to locate global object');
+}
+
+var global = getGlobal();
+
+module.exports = exports = global.fetch;
+
+// Needed for TypeScript and Webpack.
+if (global.fetch) {
+	exports.default = global.fetch.bind(global);
+}
+
+exports.Headers = global.Headers;
+exports.Request = global.Request;
+exports.Response = global.Response;
\ No newline at end of file