ensure not to support node v12

package.json

@@ -248,7 +248,7 @@
     "debug": "src/lib/service/logger/alias-for-debug"
   },
   "engines": {
-    "node": ">=8.11.1 <13",
+    "node": ">=8.11.1 <11",
     "npm": ">=5.6.0 <7",
     "yarn": ">=1.5.1 <2"
   }