Require version 2.011 for Dist::Zilla::Plugin::CompileTests

The previous version of this module would try to compile .pod files and fail.
By requiring a newer version we can remove a hack from Dancer2's dist.init.

Closes #3
Merge pull request #4 from PerlDancer/fix/min-version-compile

Require version 2.011 for Dist::Zilla::Plugin::CompileTests