chore: fix engines (#960)

Author: alexander-akait

babel.config.js

@@ -10,7 +10,7 @@ module.exports = (api) => {
  "@babel/preset-env",
  {
  targets: {
- node: "10.13.0",
+ node: "12.13.0",
  },
  },
  ],

package.json

@@ -13,7 +13,7 @@
  },
  "main": "dist/cjs.js",
  "engines": {
- "node": ">= 10.13.0"
+ "node": ">= 12.13.0"
  },
  "scripts": {
  "start": "npm run build -- -w",