Update dependency xo to ^0.60.0

Author: renovate[bot]

package.json

@@ -71,7 +71,7 @@
 	},
 	"devDependencies": {
 		"nodemon": "^2.0.4",
-		"xo": "^0.33.1"
+		"xo": "^0.60.0"
 	},
 	"xo": {
 		"semicolon": false