bump Role::Tiny prereq
remove Dist::CheckConflicts usage and Moo::Conflicts
test for working around broken superclass constructor
don't need dev Type::Tiny anymore
also clean Distar code on "make realclean"
add x_authority
not shipping moo-outdated anymore
remove remnants of Dist::CheckConflicts removal
scrub strictures env vars before attempting to test strictures behavior
run test which noisily complains about breakages
test for ->is_role on Moose roles
return true from is_role for Moose roles
test on blead
update changelog
update changelog
revise breaks test to avoid CPAN::Meta::Check prereq

CPAN::Meta::Check isn't part of any normal prereq chain, so it is
unlikely to be available when only listed as a recommendation.
CPAN::Meta::Requirements is core as of 5.16, and is bundled with modern
EUMM, so it is much more likely to be available.
replace perlstring with quotify

Instead of duplicating perlstring in multiple places, just keep it in
Sub::Quote as a public 'quotify' sub.
handle undefs directly in quotify instead of being strictly compatible with perlstring
quote undefs as `undef()` and document in more detail
allow required attributes with init_arg of undef if a default is specified