Specified Node 10.x as engine for project, as screeps now runs on Node 10

package.json

@@ -27,11 +27,14 @@
     "url": "https://github.com/screepers/screeps-typescript-starter/issues"
   },
   "homepage": "https://github.com/screepers/screeps-typescript-starter#readme",
+  "engines": {
+    "node": "10.x"
+  },
   "devDependencies": {
     "@types/chai": "^4.1.6",
     "@types/lodash": "^3.10.1",
     "@types/mocha": "^5.2.5",
-    "@types/node": "^10.5.5",
+    "@types/node": "^10.17.18",
     "@types/screeps": "^3.0.0",
     "@types/sinon": "^5.0.5",
     "@types/sinon-chai": "^3.2.0",