更新RM；

升级执行器slf4j版本

README.md

@@ -79,7 +79,7 @@ XXL-JOB是一个轻量级分布式任务调度框架，其核心设计目标是
 <dependency>
 <dependency>
     <groupId>com.xuxueli</groupId>
     <groupId>com.xuxueli</groupId>
     <artifactId>xxl-job-core</artifactId>
     <artifactId>xxl-job-core</artifactId>
-    <version>1.7.0</version>
+    <version>1.7.1</version>
 </dependency>
 </dependency>
 ```
 ```
 
 

xxl-job-executor-example/pom.xml

@@ -26,7 +26,7 @@
 		<dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
 			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.7.5</version>
+			<version>1.7.21</version>
 		</dependency>
 		</dependency>
 		
 		
 		<!-- c3p0 -->
 		<!-- c3p0 -->