Bump robotframework-appiumlibrary from 1.6.4 to 2.1.0

Bumps [robotframework-appiumlibrary](https://github.com/serhatbolsu/robotframework-appiumlibrary) from 1.6.4 to 2.1.0.
- [Release notes](https://github.com/serhatbolsu/robotframework-appiumlibrary/releases)
- [Changelog](https://github.com/serhatbolsu/robotframework-appiumlibrary/blob/master/CHANGES.rst)
- [Commits](serhatbolsu/robotframework-appiumlibrary@1.6.4...v2.1.0)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 robotframework>=5.0
 selenium==3.141.0
-robotframework-appiumlibrary==1.6.4
+robotframework-appiumlibrary==2.1.0
 psutil>=5.6.0
 Appium-Python-Client==1.3.0
 urllib3<=1.26.16