Add citation file

CITATION.cff

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+# This CITATION.cff file was generated with /Users/brian/bin/bmt
+# Thu Jun 30 14:26:30 2022
+
+abstract: Mac::PropertyList - work with Mac plists at a low level
+authors:
+- alias: briandfoy
+  email: bdfoy@cpan.org
+  family-names: foy
+  given-names: brian d
+  orcid: 0000-0002-0283-8283
+- alias: petdance
+  email: andy@petdance.com
+  family-names: Lester
+  given-names: Andy
+- alias: wiml
+  email: wiml@hhhh.org
+  family-names: Lewis
+  given-names: Wim
+- alias: omega
+  email: andreas.marienborg@gmail.com
+  family-names: Marienborg
+  given-names: Andreas
+- alias: preaction
+  email: madcityzen@gmail.com
+  family-names: Bell
+  given-names: Doug
+- alias: trwyant
+  email: wyant@cpan.org
+  family-names: Wyant
+  given-names: Tom
+- alias: bram-stappers
+  email: bram.stappers@tiobe.com
+  family-names: Stappers
+  given-names: Bram
+- alias: chris.lloyd@storyshareplatform.com
+  family-names: Lloyd
+  given-names: Chris
+cff-version: 1.2.0
+date-released: 2022-06-30
+license: artistic_2
+license-url: https://github.com/briandfoy/mac-propertylist/blob/master/LICENSE
+message: The GitHub page for this module provides formatted citations
+repository-code: https://github.com/briandfoy/mac-propertylist
+title: The Mac::PropertyList Perl module
+type: software
+version: '1.503'
+

xt/citation.t

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+# This xt/citation.t file was generated with /Users/brian/bin/bmt
+# Thu Jun 30 14:26:30 2022
+
+
+use strict;
+
+use Test::More;
+
+my $file = 'CITATION.cff';
+
+SKIP: {
+		my $rc = eval { require YAML; YAML->VERSION('1.26'); 1 };
+		skip "Need YAML to test $file", 1 unless $rc;
+
+		subtest citations => sub {
+				ok( -e $file, "$file exists" );
+				my $data = eval { YAML::LoadFile( $file ) };
+				my $error = $@;
+				ok( defined $data, "Loaded data from $file" ) or diag( "Error loading $file: $@" );
+				};
+		}
+
+done_testing();
+