games-roguelike/cataclysm-dda: add myself as a maintainer

Signed-off-by: Takuya Wakazono <pastalian46@gmail.com>

games-roguelike/cataclysm-dda/metadata.xml

@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
- 	<!-- maintainer-needed -->
+	<maintainer type="person">
+		<email>pastalian46@gmail.com</email>
+		<name>Takuya Wakazono</name>
+	</maintainer>
 	<upstream>
 		<maintainer>
 			<email>kevin.granade@gmail.com</email>