build(deps): bump flate2 from 1.1.4 to 1.1.8

Bumps [flate2](https://github.com/rust-lang/flate2-rs) from 1.1.4 to 1.1.8.
- [Release notes](https://github.com/rust-lang/flate2-rs/releases)
- [Commits](rust-lang/flate2-rs@1.1.4...1.1.8)

---
updated-dependencies:
- dependency-name: flate2
  dependency-version: 1.1.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]