https://docs.gradle.org/current/userguide/dependency_downgrade_and_exclude.html: "conflicting strict dependencies will trigger a build failure that you have to resolve".

An attempt to use `java-client:8.0.0-beta` in conjunction with Selenium 4.1.0 leads to build failures, like:
```
   > Could not resolve org.seleniumhq.selenium:selenium-remote-driver:{strictly 4.0.0}.
     Required by:
         project :xxxxxxx > io.appium:java-client:8.0.0-beta
```
In a favor of flexibility the constraints of selenium dependencies versions are relaxed.