Bump npm from 3.6.2 to 6.14.6

Bumps [npm](https://github.com/npm/cli) from 3.6.2 to 6.14.6.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/v6.14.6/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/commits/v6.14.6)

---
updated-dependencies:
- dependency-name: npm
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -10,6 +10,6 @@
         "http-proxy-middleware": "2.0.5",
         "morgan": "1.10.0",
         "mysterium-vpn-js": "28.0.0",
-        "npm": "3.6.2"
+        "npm": "6.14.6"
     }
 }