Make Assert failNotEquals public

[Martin-Office]

I had to implement a custom equal function but I cannot report the failure with the existing functionality of Assert class.
I wanted to reuse the function Assert.failNotEquals but it's private, not sure why.
Can you make it public?

[marcphilipp]

FWIW JUnit Jupiter provides AssertionFailureBuilder for this use case.

[junit-builds]

JUnit 4 is now in maintenance mode.

At this point, only critical bugs and security issues will be fixed.

The team has therefore decided to close this issue.