chore(deps): update dependency @rollup/plugin-url to v6

This MR contains the following updates:

Package	Type	Update	Change
@rollup/plugin-url	devDependencies	major	^5.0.1 -> ^6.0.0

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package.json

@@ -15,7 +15,7 @@
     "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^10.0.0",
     "@rollup/plugin-replace": "^2.3.3",
-    "@rollup/plugin-url": "^5.0.1",
+    "@rollup/plugin-url": "^6.0.0",
     "babel-eslint": "^10.0.3",
     "chai": "^4.2.0",
     "eslint": "^7.3.1",