Bump yarl from 1.4.2 to 1.5.1

Bumps [yarl](https://github.com/aio-libs/yarl) from 1.4.2 to 1.5.1.
- [Release notes](https://github.com/aio-libs/yarl/releases)
- [Changelog](https://github.com/aio-libs/yarl/blob/master/CHANGES.rst)
- [Commits](aio-libs/yarl@v1.4.2...v1.5.1)

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

Author: dependabot-preview[bot]

requirements.txt

@@ -15,4 +15,4 @@ requests==2.22.0
 soupsieve==1.9.5
 urllib3==1.25.8
 websockets==8.1
-yarl==1.4.2
+yarl==1.5.1