Fix version without patch not being detected on spigot/paper correctly

Author: TBlueF

implementations/spigot/src/main/java/de/bluecolored/bluemap/bukkit/BukkitPlugin.java

@@ -74,7 +74,7 @@ public BukkitPlugin() {
 		//try to get best matching minecraft-version
 		try {
 			String versionString = getServer().getBukkitVersion();
-			Matcher versionMatcher = Pattern.compile("(\\d+\\.\\d+\\.\\d+)[-_].*").matcher(versionString);
+			Matcher versionMatcher = Pattern.compile("(\\d+(?:\\.\\d+){1,2})[-_].*").matcher(versionString);
 			if (!versionMatcher.matches()) throw new IllegalArgumentException();
 			version = MinecraftVersion.of(versionMatcher.group(1));
 		} catch (IllegalArgumentException e) {