use AUTHOR_TESTING instead of RELEASE_TESTING

MANIFEST

@@ -40,12 +40,12 @@ t/opencage.t
 t/osm.t
 t/ovi.t
 t/pod-cm.t
+t/pod-snippets.t
 t/pod-spelling.t
 t/pod-synopsis.t
 t/pod.t
 t/postcodes.t
 t/rand.t
-t/snippets.t
 t/ua.t
 t/unused.t
 t/us.t

t/pod-snippets.t

@@ -0,0 +1,16 @@
+#!perl -wT
+
+use strict;
+use warnings;
+use Test::Most;
+use Test::Needs 'Test::Pod::Snippets';
+
+if($ENV{'AUTHOR_TESTING'}) {
+	my @modules = qw/ Geo::Coder::List /;
+	Test::Pod::Snippets->import();
+	Test::Pod::Snippets->new()->runtest(module => $_, testgroup => 1) for @modules;
+
+	done_testing();
+} else {
+	plan(skip_all => 'Author tests not required for installation');
+}