Bump npm from 6.14.13 to 6.14.15 (#3838)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -223,7 +223,7 @@
     "monaco-editor": "^0.26.1",
     "node-fetch": "^2.6.1",
     "node-pty": "^0.10.1",
-    "npm": "^6.14.8",
+    "npm": "^6.14.15",
     "openid-client": "^3.15.2",
     "p-limit": "^3.1.0",
     "path-to-regexp": "^6.1.0",