chore: Update Node minimum version to 10

BREAKING CHANGE:
documentation.js will now require node 10 or later.

Author: tmcw

package.json

@@ -134,7 +134,7 @@
     }
   },
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "lint-staged": {
     "*.js": [