v6.2.1

📚 PR:

• feat: switch to tsd (#22)
• fix: idGenerator isn't in the options type. (#26)
• build(deps): bump actions/checkout from 2.3.4 to 2.3.5 (#28)
• Bump actions/setup-node from 2.4.0 to 2.4.1 (#25)
• fix: options both expires maxage (#30)
• fix(types): type get & set correctly (#32)
• Bump fastify/github-action-merge-dependabot from 2.4.0 to 2.5.0 (#23)
• build(deps-dev): bump tsd from 0.17.0 to 0.18.0 (#27)