doc: update npm license in main LICENSE file

PR-URL: nodejs/node#10352

LICENSE

@@ -322,11 +322,32 @@ maintained libraries. The externally maintained libraries used by Node are:
 - npm is a package manager program located at deps/npm.
   npm's license follows:
   """
-    Copyright (c) Isaac Z. Schlueter
-    All rights reserved.
+    The npm application
+    Copyright (c) npm, Inc. and Contributors
+    Licensed on the terms of The Artistic License 2.0
+
+    Node package dependencies of the npm application
+    Copyright (c) their respective copyright owners
+    Licensed on their respective license terms
+
+    The npm public registry at https://registry.npmjs.org
+    and the npm website at https://www.npmjs.com
+    Operated by npm, Inc.
+    Use governed by terms published on https://www.npmjs.com
+
+    "Node.js"
+    Trademark Joyent, Inc., https://joyent.com
+    Neither npm nor npm, Inc. are affiliated with Joyent, Inc.
 
-    npm is released under the Artistic 2.0 License.
-    The text of the License follows:
+    The Node.js application
+    Project of Node Foundation, https://nodejs.org
+
+    The npm Logo
+    Copyright (c) Mathias Pettersson and Brian Hammond
+
+    "Gubblebum Blocky" typeface
+    Copyright (c) Tjarda Koster, https://jelloween.deviantart.com
+    Used with permission
 
 
     --------
@@ -533,30 +554,6 @@ maintained libraries. The externally maintained libraries used by Node are:
     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
     DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF
     ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-    --------
-
-
-    "Node.js" and "node" trademark Joyent, Inc. npm is not officially
-    part of the Node.js project, and is neither owned by nor
-    officially affiliated with Joyent, Inc.
-
-    Packages published in the npm registry (other than the Software and
-    its included dependencies) are not part of npm itself, are the sole
-    property of their respective maintainers, and are not covered by
-    this license.
-
-    "npm Logo" created by Mathias Pettersson and Brian Hammond,
-    used with permission.
-
-    "Gubblebum Blocky" font
-    Copyright (c) by Tjarda Koster, http://jelloween.deviantart.com
-    included for use in the npm website and documentation,
-    used with permission.
-
-    This program uses several Node modules contained in the node_modules/
-    subdirectory, according to the terms of their respective licenses.
   """
 
 - tools/doc/node_modules/marked. Marked is a Markdown parser. Marked's