chore: install sharp (#233)

- `cosmos-kit` 2.23.10 is currently broken.
  hyperweb-io/cosmos-kit#540
  Fixing to 2.23.9

- `@octokit/webhooks` 13.5.0 is currently broken.
  octokit/webhooks.js#1099
  Fixing to 13.4.3

Author: fmorency