Run tests against Go 1.8 and newer only
Run tests against Go 1.8 and newer only

Signed-off-by: Stephan Peijnik-Steinwender <6ff875d5fb2cf957858f4aac3650c8acf54e0adf@anexia-it.com>

anexia-it/go-structconf,anexia-it/go-structconf