Update jna: 4.5.2 -> 5.12.1

I was concerned this update might break some components, but the
mega-melt identifies no problems with it, so we're good to go.

Closes #163.

pom.xml

@@ -10,7 +10,7 @@
 	</parent>
 
 	<artifactId>pom-scijava</artifactId>
-	<version>32.0.1-SNAPSHOT</version>
+	<version>33.0.0-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<name>SciJava Parent POM</name>
@@ -1704,7 +1704,7 @@
 		<org.jmockit.jmockit.version>${jmockit.version}</org.jmockit.jmockit.version>
 
 		<!-- JNA - https://github.com/twall/jna -->
-		<jna.version>4.5.2</jna.version>
+		<jna.version>5.12.1</jna.version>
 		<net.java.dev.jna.jna.version>${jna.version}</net.java.dev.jna.jna.version>
 
 		<!-- Joda-Time - https://www.joda.org/joda-time/ -->