Update requirements to node 10 LTS

README.md

@@ -22,7 +22,7 @@ npx screeps start
 ```
 
 Prerequisites:
- * Node.js 8 LTS or higher
+ * Node.js 10 LTS or higher
  * Python 2 (for node-gyp, [Python 3 is not supported](https://github.com/nodejs/node-gyp/issues/193))
  * Build tools (`apt install build-essential` for Ubuntu, [Visual Studio](https://www.visualstudio.com/vs/) for Windows, etc) 
 

package.json

@@ -22,7 +22,7 @@
     "@screeps/storage": "5.0.0-beta.2"
   },
   "engines": {
-    "node": ">=8.10.0",
+    "node": ">=10.13.0",
     "npm": ">=3.10.3"
   }
 }