Update dependency @ota-meshi/eslint-plugin-svelte to ^0.21.0 (#94)

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

Author: renovate[bot]

package.json

@@ -72,7 +72,7 @@
     "@babel/types": "^7.16.0",
     "@fontsource/fira-mono": "^4.5.0",
     "@ota-meshi/eslint-plugin": "^0.10.0",
-    "@ota-meshi/eslint-plugin-svelte": "^0.20.0",
+    "@ota-meshi/eslint-plugin-svelte": "^0.21.0",
     "@sindresorhus/slugify": "^2.1.0",
     "@sveltejs/adapter-static": "^1.0.0-next.21",
     "@sveltejs/kit": "^1.0.0-next.201",