Get rid of use utf8, not required

Signed-off-by: Pedro Melo <melo@simplicidade.org>
Remove :syntax tags from Dancer2 use, deprecated

Signed-off-by: Pedro Melo <melo@simplicidade.org>
Hack: try and convince Dancer2::Test to find the configuration file

Signed-off-by: Pedro Melo <melo@simplicidade.org>