Move node-fetch to dependencies, update version

Author: dmitrizagidulin

package-lock.json

@@ -56,6 +56,7 @@
     "li": "^1.0.1",
     "mime-types": "^2.1.11",
     "negotiator": "^0.6.0",
+    "node-fetch": "^2.1.2",
     "node-forge": "^0.6.38",
     "nodemailer": "^3.1.4",
     "oidc-auth-manager": "^0.15.2",
@@ -83,7 +84,6 @@
     "localstorage-memory": "^1.0.2",
     "mocha": "^5.1.1",
     "nock": "^9.0.14",
-    "node-fetch": "^1.7.1",
     "node-mocks-http": "^1.7.0",
     "nyc": "^10.1.2",
     "sinon": "^2.1.0",