move release tests to separate folder

t/release/manifest.t

@@ -0,0 +1,15 @@
+#!perl -T
+use 5.006;
+use strict;
+use warnings;
+use Test::More;
+
+unless ( $ENV{RELEASE_TESTING} ) {
+    plan( skip_all => "Author tests not required for installation" );
+}
+
+my $min_tcm = 0.9;
+eval "use Test::CheckManifest $min_tcm";
+plan skip_all => "Test::CheckManifest $min_tcm required" if $@;
+
+ok_manifest();