Update to 0.159000.

Changes: https://metacpan.org/changes/distribution/Dancer2

Dancer2 now preferentially uses Plack::MIME instead of MIME::Types so remove
that as a dependency.

Also, reset maintainership to perl@ per maintainer's request. Thanks to wen
for his time spent maintaining this port.

PR: 197993
Approved by: wen (maintainer)