Add funding field to package.json

Author: sindresorhus

package.json

@@ -4,6 +4,7 @@
 	"description": "Parse and stringify URL query strings",
 	"license": "MIT",
 	"repository": "sindresorhus/query-string",
+	"funding": "https://github.com/sponsors/sindresorhus",
 	"author": {
 		"name": "Sindre Sorhus",
 		"email": "[email protected]",