Update httpmock requirement from 0.6 to 0.7

Updates the requirements on [httpmock](https://github.com/alexliesenfeld/httpmock) to permit the latest version.
- [Release notes](https://github.com/alexliesenfeld/httpmock/releases)
- [Changelog](https://github.com/alexliesenfeld/httpmock/blob/master/CHANGELOG.md)
- [Commits](alexliesenfeld/httpmock@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: httpmock
  dependency-type: direct:production
...

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

Cargo.toml

@@ -26,7 +26,7 @@ tracing = "0.1"
 [dev-dependencies]
 tokio = { version = "1", features = ["macros"] }
 mockall = "0.12"
-httpmock = "0.6"
+httpmock = "0.7"
 rand = "0.8"
 
 [[example]]