extension/package.json: upgrade dev dependencies

Before: 4 low, 5 moderate, 14 high, 1 critical
After:  3 low, 18 high

Change-Id: I2b96af6c127a9f9ad7f2064c9181db15659bf9d8
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/807080
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

Author: h9jiang

extension/LICENSE

@@ -730,11 +730,11 @@ OTHER DEALINGS IN THE SOFTWARE.
 
 -----
 
-The following software may be included in this product: ms. A copy of the source code may be downloaded from https://github.com/zeit/ms.git. This software contains the following license and notice below:
+The following software may be included in this product: ms. A copy of the source code may be downloaded from https://github.com/vercel/ms.git. This software contains the following license and notice below:
 
 The MIT License (MIT)
 
-Copyright (c) 2016 Zeit, Inc.
+Copyright (c) 2020 Vercel, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -925,7 +925,7 @@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 
 The following software may be included in this product: websocket-driver. A copy of the source code may be downloaded from git://github.com/faye/websocket-driver-node.git. This software contains the following license and notice below:
 
-Copyright 2010-2020 James Coglan
+Copyright 2010-2026 James Coglan
 
 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