chore(deps): update dependency rollup-plugin-filesize to v7 (#865)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -91,7 +91,7 @@
     "prettier": "^1.19.1",
     "rollup": "^1.32.0",
     "rollup-plugin-babel": "^4.3.3",
-    "rollup-plugin-filesize": "^6.2.1",
+    "rollup-plugin-filesize": "^7.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-size-snapshot": "^0.11.0",
     "sinon": "^9.0.0",