Use proper Apache License format (#6189)

The existing LICENSE file was missing the Appendix, and also
used weird formatting. Now it's an exact copy of the original:

https://www.apache.org/licenses/LICENSE-2.0.txt.

LICENSE

@@ -1,6 +1,7 @@
+
                                  Apache License
                            Version 2.0, January 2004
-                    https://www.apache.org/licenses/
+                        http://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
@@ -175,13 +176,24 @@ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
    END OF TERMS AND CONDITIONS
 
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
    Copyright 2017 Vercel, Inc.
 
    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
 
-   https://www.apache.org/licenses/LICENSE-2.0
+       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,

package.json

@@ -2,7 +2,7 @@
   "name": "vercel-monorepo",
   "version": "0.0.0",
   "private": true,
-  "license": "MIT",
+  "license": "Apache-2.0",
   "workspaces": {
     "packages": [
       "packages/*"