chore(tests) update http requirement

Updates the requirements on [http](https://github.com/hyperium/http) to permit the latest version.

Updates `http` to 1.2.0
- [Release notes](https://github.com/hyperium/http/releases)
- [Changelog](https://github.com/hyperium/http/blob/master/CHANGELOG.md)
- [Commits](hyperium/http@v0.2.0...v1.2.0)

---
updated-dependencies:
- dependency-name: http
  dependency-type: direct:production
  dependency-group: production-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

t/lib/proxy-wasm-tests/hostcalls/Cargo.toml

@@ -10,6 +10,6 @@ crate-type = ["cdylib"]
 [dependencies]
 proxy-wasm = "0.2"
 log = "0.4"
-http = "0.2"
+http = "1.2"
 enum-utils = "0.1.2"
 urlencoding = "2.1.2"