.travis.yml: try using only cpanm for dependencies
.travis.yml: try using only cpanm for dependencies

Avoid App::mymeta_requires and delegate all dependency resolution to cpanm.

Signed-off-by: Jens Rehsack <69d49c504a9219a55b8be0f905e8fe3c32ffb57f@netbsd.org>

perl5-utils/List-MoreUtils-XS,perl5-utils/List-MoreUtils-XS