Explicitly install vscode-nls as a dependency

[winstliu]

features/json/projectJSONContribution.ts uses the vscode-nls package; however, up until now, it wasn't actually included as a direct dependency:

$ npm ls vscode-nls
+-- [email protected]
| `-- [email protected]
|   `-- [email protected]
`-- [email protected]
  `-- [email protected]

It's probably a good idea to include it so that its version can be controlled :).

(By the way, what's up with the various zero-width breaking spaces in the package.json? npm keeps trying to convert them to...something else.)

[JoeRobich]

@50Wliu Thanks for this change.

(By the way, what's up with the various zero-width breaking spaces in the package.json? npm keeps trying to convert them to...something else.)

The goal is to keep certain example urls from being turned into links when viewed in VS Code. It predates me, so perhaps there is a better way now.