missing fhir types in notification causes service to crash

Author: euanmillar

packages/notification/package.json

@@ -39,14 +39,15 @@
     "winston": "^3.0.0"
   },
   "devDependencies": {
+    "@types/fhir": "^0.0.30",
     "@types/jest": "^24.0.13",
     "cross-env": "^5.2.0",
     "jest": "24.7.1",
     "jest-fetch-mock": "^2.1.2",
+    "lint-staged": "^7.1.0",
     "nodemon": "^1.17.5",
     "prettier": "^1.15.2",
     "ts-jest": "^24.0.2",
-    "lint-staged": "^7.1.0",
     "ts-node": "^6.1.1",
     "tsconfig-paths": "^3.8.0",
     "tslint": "^5.17.0",