chore!: drop Node 8 (#456)

Author: ehmicky

package-lock.json

@@ -51,7 +51,7 @@
     "upper-case-first": "^2.0.2"
   },
   "engines": {
-    "node": ">=8.3.0"
+    "node": ">=10.18.0"
   },
   "ava": {
     "timeout": "2m",