Support Fastify v4

[CodyTseng]

First of all thank you so much for such a great project. I like this monitor very much. Recently I want to replace express with fastify, and I replace @bull-monitor/express with @bull-monitor/fastify. The following error occurs

/../node_modules/fastify/lib/pluginUtils.js:118
    throw new FST_ERR_PLUGIN_VERSION_MISMATCH(meta.name, requiredVersion, this.version)
          ^
FastifyError [Error]: fastify-plugin: fastify-accepts - expected '3.x' fastify version, '4.10.2' is installed