Bump johnzon-mapper from 1.2.7 to 1.2.8
Bump johnzon-mapper from 1.2.7 to 1.2.8

Bumps johnzon-mapper from 1.2.7 to 1.2.8.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
lukas-krecan/JsonUnit,lukas-krecan/JsonUnit