chore: make svelte v5-next.8 minimum dependency of v5 (#432)

Author: ota-meshi

package.json

@@ -46,7 +46,7 @@
     "version:ci": "env-cmd -e version-ci pnpm run build:meta && changeset version"
   },
   "peerDependencies": {
-    "svelte": "^3.37.0 || ^4.0.0 || ^5.0.0-next.2"
+    "svelte": "^3.37.0 || ^4.0.0 || ^5.0.0-next.8"
   },
   "peerDependenciesMeta": {
     "svelte": {
@@ -104,7 +104,7 @@
     "prettier-plugin-svelte": "^3.0.0",
     "rimraf": "^5.0.1",
     "semver": "^7.5.1",
-    "svelte": "^5.0.0-next.2",
+    "svelte": "^5.0.0-next.8",
     "svelte2tsx": "^0.6.25",
     "typescript": "~5.1.3",
     "typescript-eslint-parser-for-extra-files": "^0.5.0"