Make leaktrace.t as a regular test

perl/t/50_leaktrace.t

@@ -0,0 +1,58 @@
+#!perl -w
+use strict;
+use Test::Requires { 'Test::LeakTrace' => 0.13 };
+use Test::More;
+
+use Data::MessagePack;
+
+my $simple_data  = "xyz";
+my $complex_data = {
+    a => 'foo',
+    b => 42,
+    c => undef,
+    d => [qw(bar baz)],
+    e => 3.14,
+};
+
+note 'pack';
+
+no_leaks_ok {
+    my $s = Data::MessagePack->pack($complex_data);
+};
+
+no_leaks_ok {
+    eval { Data::MessagePack->pack([\*STDIN]) };
+    note $@;
+    $@ or warn "# it must die";
+};
+
+note 'unpack';
+
+my $s = Data::MessagePack->pack($simple_data);
+my $c = Data::MessagePack->pack($complex_data);
+
+no_leaks_ok {
+    my $data = Data::MessagePack->unpack($s);
+};
+
+no_leaks_ok {
+    my $data = Data::MessagePack->unpack($c);
+};
+
+no_leaks_ok {
+    my $broken = $s;
+    chop $broken;
+    eval { Data::MessagePack->unpack($broken) };
+    note $@;
+    $@ or warn "# it must die";
+};
+
+note 'stream';
+
+no_leaks_ok {
+    my $up = Data::MessagePack::Unpacker->new();
+    $up->execute($c);
+    my $data = $up->data();
+};
+
+done_testing;