Setup installs the 'tests' package

[erezinman]

Describe the bug
During the installation, the use of the find_packages() function without any parameters causes the package tests to be installed. This is (possibly) an unintended behavior, and since almost every project repository contains a directory called "tests", this messes up with some IDEs and systems, and is generally prone to errors.

Since both the main package and the tests package are installed together during setup, I am forced to remove this package for now.

Please fix this promptly.
Thanks!