JBEHAVE-1561 Bump TestNG from `7.5` to `7.6.1`
JBEHAVE-1561 Bump TestNG from `7.5` to `7.6.1`

Bumps [testng](https://github.com/cbeust/testng) from 7.5 to 7.6.1.
- [Release notes](https://github.com/cbeust/testng/releases)
- [Changelog](https://github.com/cbeust/testng/blob/master/CHANGES.txt)
- [Commits](https://github.com/cbeust/testng/compare/7.5...7.6.1)

Signed-off-by: Valery Yatsynovich <e839d7693e93e9656f82ca7ccf95f186f0bc756a@epam.com>

jbehave/jbehave-core,jbehave/jbehave-core,jbehave/jbehave-core,jbehave/jbehave-core