[2.4.0] 添加自动检查更新机制，并允许开关。

pom.xml

@@ -13,7 +13,7 @@
 
     <groupId>cc.carm.plugin</groupId>
     <artifactId>userprefix</artifactId>
-    <version>2.3.3</version>
+    <version>2.4.0</version>
 
     <name>UserPrefix</name>
     <description>轻便、高效、实时的用户前缀系统。</description>
@@ -127,6 +127,13 @@
             <scope>compile</scope>
         </dependency>
 
+        <dependency>
+            <groupId>cc.carm.lib</groupId>
+            <artifactId>githubreleases4j</artifactId>
+            <version>1.3.1</version>
+            <scope>compile</scope>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
@@ -209,9 +216,16 @@
                     <relocations>
                         <relocation>
                             <pattern>org.bstats</pattern>
-                            <!-- Replace this with your package! -->
                             <shadedPattern>cc.carm.plugin.userprefix.bstats</shadedPattern>
                         </relocation>
+                        <relocation>
+                            <pattern>cc.carm.lib.githubreleases4j</pattern>
+                            <shadedPattern>cc.carm.plugin.userprefix.lib.github</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>org.json</pattern>
+                            <shadedPattern>cc.carm.plugin.userprefix.lib.json</shadedPattern>
+                        </relocation>
                     </relocations>
                     <filters>
                         <filter>