Update version number towards next release.

Author: Staartvin

pom.xml

@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>Autorank</groupId>
     <artifactId>Autorank</artifactId>
-    <version>4.3-SNAPSHOT-${BUILD_NUMBER}</version>
+    <version>4.3.1-SNAPSHOT-${BUILD_NUMBER}</version>
     <name>Autorank</name>
     <description>Maven project for Spigot plugin Autorank</description>
     <url>https://www.spigotmc.org/resources/autorank.3239/</url>