Adding NodeJS version 12 env (#1683)

Co-authored-by: Rahul Bhati <rjbhati009@gmail.com>

test/tests/test_environments/node_src/test-case-4/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "fission-nodejs-runtime",
+  "engines": {
+    "node": ">=7.6.0"
+  },
+  "dependencies": {
+    "moment": "*"
+  }
+}