Bump multidict from 5.2.0 to 6.0.1 (#332)

* Bump multidict from 5.2.0 to 6.0.1

Bumps [multidict](https://github.com/aio-libs/multidict) from 5.2.0 to 6.0.1.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](https://github.com/aio-libs/multidict/compare/v5.2.0...v6.0.1)

---
updated-dependencies:
- dependency-name: multidict
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Fixed Python 3.6 compatibility

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Soxoj <soxoj@protonmail.com>

requirements.txt

@@ -15,7 +15,8 @@ Jinja2==3.0.3
 lxml==4.7.1
 MarkupSafe==2.0.1
 mock==4.0.3
-multidict==5.2.0
+multidict==5.2.0;python_version<"3.7"
+multidict==6.0.1;python_version>="3.7"
 pycountry==22.1.10
 PyPDF2==1.26.0
 PySocks==1.7.1