v2.5.1

📚 PR:

• chore(gitignore): use latest github ignore template (#295)
• ci(dependabot): update github actions (#296)
• Bump actions/setup-node from v1 to v2.1.5 (#297)
• Bump fastify/github-action-merge-dependabot from v1 to v1.2.1 (#298)
• Fix creation of invalid JSON when serializing functions or symbols (#299) (#300)