v2.4.0

📚 PR:

• 📝 Fix TS snippet in docs (#133)
• chore(gitignore): use latest github ignore template (#134)
• ci(dependabot): update github actions (#135)
• Bump actions/setup-node from v1 to v2.1.5 (#137)
• Bump fastify/github-action-merge-dependabot from v1 to v1.2.1 (#136)
• add jwks usage to readme (#138)
• Bump fastify/github-action-merge-dependabot from v1.2.1 to v2.0.0 (#141)
• feat: support promise/async secret function (#142)