Bumps [http](https://github.com/dart-lang/http/tree/master/pkgs) from
1.1.2 to 1.2.0.
<details>
<summary>Commits</summary>
<ul>
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</details>
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[![Dependabot compatibility
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[//]: # (dependabot-automerge-start)
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</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>