Update dependency com.velocitypowered:velocity-api to v4

Author: renovate[bot]

pom.xml

@@ -49,7 +49,7 @@
 	<dependency>
 		<groupId>com.velocitypowered</groupId>
 		<artifactId>velocity-api</artifactId>
-		<version>3.5.1</version>
+		<version>4.0.0</version>
 		<scope>provided</scope>
 	</dependency>
 	<dependency>