Perl CPAN Support, Missing 'author' Field

[wbraswell]

When attempting to package Class::Data::Inheritable (or presumably any CPAN distribution with blank 'author' field), we get a crash when we should just handle it and move forward.

$ fpm --no-cpan-test --cpan-verbose --verbose --debug-workspace --workdir /home/wbraswell/fpm_tmp/ -s cpan -t rpm Class::Data::Inheritable
...
SOME OUTPUT
...
Invalid package configuration: Unexpected CPAN 'author' field type: NilClass. This is a bug.

The correct solution is to note that no vendor or author has been provided, and continue with the packaging process. I have done this in my latest commit here:
wbraswell@f4f4b56

[wbraswell]

@liger1978
Found another bug! LOL
I did not make a pull request because my fork is now quite out of sync with the main repo, but still you can see my simple 1-line fix in my commit.

[wbraswell]

This issue has been solved by @NicholasBHubbard in the following two pull requests:
#1937
#1942