docs: update the list of supported Node.js versions

The Engine.IO server uses `timeout.refresh()` (see [1]), which was
added in Node.js 10.2.0.

Reference: https://nodejs.org/api/timers.html#timeoutrefresh

Related: socketio/engine.io#686

[1]: socketio/engine.io@37474c7

package.json

@@ -89,7 +89,7 @@
     }
   ],
   "engines": {
-    "node": ">=10.0.0"
+    "node": ">=10.2.0"
   },
   "tsd": {
     "directory": "test"