Bump deno and package versions

[danielemery]

• Upgrade to latest nix unstable version of deno (v1.37.1)
• Upgrade to latest deno std library (0.204.0)
  • Migrate to new standard Deno.serve for main server (serve now deprecated)
  • Fix StatusText breaking changes (changed from a Map to a Record)

[codecov[bot]]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (ed60756) 80.53% compared to head (0790140) 80.08%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13 +/- ## ========================================== - Coverage 80.53% 80.08% -0.45% ========================================== Files 5 5 Lines 226 226 Branches 13 13 ========================================== - Hits 182 181 -1 - Misses 44 45 +1 ``` | [Files](https://app.codecov.io/gh/danielemery/keys/pull/13?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Daniel+Emery) | Coverage Δ | | |---|---|---| | [deps.ts](https://app.codecov.io/gh/danielemery/keys/pull/13?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Daniel+Emery#diff-ZGVwcy50cw==) | `100.00% <100.00%> (ø)` | | | [src/server.ts](https://app.codecov.io/gh/danielemery/keys/pull/13?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Daniel+Emery#diff-c3JjL3NlcnZlci50cw==) | `10.20% <11.11%> (-0.22%)` | :arrow_down: |

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