add a minimal cds-test package json

Author: rlindner81

test/cds-test-services/package-lock.json

@@ -0,0 +1,8 @@
+{
+  "private": true,
+  "dependencies": {
+    "@sap/cds-mtxs": "file://../../node_modules/@sap/cds-mtxs",
+    "@cap-js/sqlite": "file://../../node_modules/@cap-js/sqlite",
+    "@cap-js-community/feature-toggle-library": "file://../../"
+  }
+}