v0.3.0-beta.15

• Add json-loader offical plugin
• Fix SSR data passing (#383) @Nkzn
• Fix invalid jsFile on windows (#389)
• Await renderListener callback (#393) @TjeuKayim
• Fix existsFile usage (#394) @getspooky
• Migrate from denolib/setup-deno to denoland/setup-deno (#387) @uki00a
• Upgrade esbuild to 0.12.28
• Upgrade swc deps