Add empty test script to work around npm error

Author: binarymist

package.json

@@ -21,7 +21,8 @@
     "build:s2DeprovisionerPackage": "npm run mkCloudDistDir && cd cloud/s2-deprovisioner/ && zip -r ../../cloudDist/s2-deprovisioner.zip . -x out.txt",
     "build:emissaryDeprovisionerDeploymentPackage": "npm run build:s2DeprovisionerPackage",
     "build:s2EcsServiceDeletion": "npm run mkCloudDistDir && cd cloud/s2-ecs-service-deletion/ && zip -r ../../cloudDist/s2-ecs-service-deletion.zip . -x out.txt",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "test": ""
   },
   "pre-commit": [
     "lint"