v3.4.0

📚 PR:

• Bump fastify-plugin from 2.3.4 to 3.0.0
• Bump standard from 14.3.4 to 15.0.0
• Updated dependencies
• Fix spelling of decorates (#102)
• Document onResponse replacing reply body (#104)
• feat: add stale (#107)
• issue-108: Add an option to provide custom http/s agent (#109)