Update npm to version 6.2.0.

The pacote dependency (a small fork of which we maintain) remains at
version 8.1.6.

History.md

@@ -48,7 +48,7 @@
   versions of Meteor without having to publish multiple versions of your
   package. [PR #9983](https://github.com/meteor/meteor/pull/9983)
 
-* The `npm` package has been upgraded to version 6.1.0, and our
+* The `npm` package has been upgraded to version 6.2.0, and our
   [fork](https://github.com/meteor/pacote/tree/v8.1.6-meteor) of its
   `pacote` dependency has been rebased against version 8.1.6.
 

scripts/build-dev-bundle-common.sh

@@ -8,7 +8,7 @@ ARCH=$(uname -m)
 NODE_VERSION=8.11.3
 MONGO_VERSION_64BIT=3.6.4
 MONGO_VERSION_32BIT=3.2.19
-NPM_VERSION=6.1.0
+NPM_VERSION=6.2.0
 
 # If we built Node from source on Jenkins, this is the build number.
 NODE_BUILD_NUMBER=

scripts/dev-bundle-tool-package.js

@@ -10,7 +10,7 @@ var packageJson = {
   dependencies: {
     // Explicit dependency because we are replacing it with a bundled version
     // and we want to make sure there are no dependencies on a higher version
-    npm: "6.1.0",
+    npm: "6.2.0",
     pacote: "https://github.com/meteor/pacote/tarball/a3285854a68e4969d6c8abaa74407f7d113b178f",
     "node-gyp": "3.6.2",
     "node-pre-gyp": "0.6.36",