Fix argument syntax in help action
Accept custom entries in meta_merge 1.4
Prepare for 0.4204
Bump version to 0.4205
FIX license code regression

* Updated 'artistic' and 'artistic_2' valid license names to valid CPAN::Meta Spec 2.0 strings
* BUG was causing CPAN::Meta exceptions when constructing META files
Don't swallow ExtUtils::CBuilder loading errors

This is a edifice from the past, when EU::CB was an optional dependency.
In modern days, any error in loading it should be considered a toolchain
malfunction, not a lack of a compiler.
Changlog 'Don't swallow EU::CB loading errors'
t/lib/MBTest.pm: When cross-compiling, check the compiler even if PERL_CORE=1

This is because the target system might not have a compiler at all,
or might have a compiler/ccflags combination that doesn't mesh well,
so we can't assume anything.
M::B::Unix::_detildefy: Protect against platforms without getpw{nam,uid}

Unfortunately there is no %Config key to check, so we have to
eval {} the calls; We also make the getpwuid case default to glob("~").
Use guess_license_from_meta_key if available

This is necessary for the artistic licenses for example, because their meta
names don't match their class names.
Prepare for release 0.4205
Bumped to version 0.4206
Make the meta tests more robust to CPAN::Meta changes

As done for ExtUtils::MakeMaker v6.91_01
Enable release and author tests during disttest
update the minimum perl version required

On 5.6.2 I got:

t/manifypods_with_utf8.t ....... Undefined subroutine utf8::encode called at t/manifypods_with_utf8.t line 35.

So the stated prereq of 5.6.1 isn't actually true anymore.
Fix MBTest to work with new and old versions of Test::Builder

What MBTest did was never right, but broke completely when TB changed.
This makes it significantly more sane.
Prepare for release 0.4206
Bumped to version 0.4207
Fix type installdir -> installdirs

This caused a double installdirs argument not to be merged properly
Remove Module::Build::YAML

It will be offered on CPAN in a different dist in case anyone is really
depending on it