fix(node): Drop Node 8.

Closes #113

BREAKING CHANGE: Node 10 or greater is now required to use this package

Author: kentcdodds

package.json

@@ -4,7 +4,7 @@
   "description": "Simple and complete custom Cypress commands and utilities that encourage good testing practices.",
   "main": "dist/index.js",
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "scripts": {
     "build": "kcd-scripts build",