adding node min reqs

README.md

@@ -3,7 +3,6 @@
 Type checking module for anywhere javascript can run ES6 modules. This includes node, electron and the browsers. Fully isomorphic.
 
 npm strong-type info :  [See npm trends and stats for strong-type](http://npm-stat.com/charts.html?package=strong-type&author=&from=&to=)  
-[![Package Quality](http://npm.packagequality.com/badge/strong-type.png)](http://packagequality.com/#?package=strong-type)  
 ![strong-type npm version](https://img.shields.io/npm/v/strong-type.svg) ![supported node version for strong-type](https://img.shields.io/node/v/strong-type.svg) ![total npm downloads for strong-type](https://img.shields.io/npm/dt/strong-type.svg) ![monthly npm downloads for strong-type](https://img.shields.io/npm/dm/strong-type.svg) ![npm licence for strong-type](https://img.shields.io/npm/l/strong-type.svg)
 
 ` npm install --save strong-type `  

package.json

@@ -1,12 +1,15 @@
 {
   "name": "strong-type",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "type": "module",
   "description": "allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types",
   "main": "index.js",
   "directories": {
     "example": "example"
   },
+  "engines": {
+    "node": ">=13.0.0"
+  },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "start": "node ./node_modules/node-http-server/bin/nhs.js port=8000 verbose=true",