Update TypeScript dependencies

[antiphoton]

Closes #161

Note to the second commit in this PR

Object.keys(pkg.dependencies) === [
  'fastify',
  'node-fetch',
  'puppeteer',
]

node-fetch v3 no longer support commonjs (example), hence we need to let rollup to compile node-fetch, by removing node-fetch from the external list.

[twifkak]

Thanks!