v0.44.3

chore(deps): Update to kong@1.9.0 (#450)

This pull request has 3 commits. Kong v0.9.0 has a couple of breaking
changes for `hermit`, so:
1. The first commit updates from Kong 0.5.0 → 0.8.1 safely
2. The second commit updates to Kong 0.9.0 and sorts out the changes
3. The third commit updates from Kong 0.9.0 → 1.9.0 safely

- [x] (Ideally I'd merge https://github.com/alecthomas/kong/pull/507 and
then bump this to the next version)

fixes #444