(chore) log4j.version in property

Author: liuchong

pom.xml

@@ -57,6 +57,8 @@
         <module.jacoco.skip>true</module.jacoco.skip>
         <project.build.sourceEncoding>utf-8</project.build.sourceEncoding>
         <skipTests>false</skipTests>
+        <log4j.version>2.13.2</log4j.version>
+        <slf4j.version>1.7.29</slf4j.version>
     </properties>
 
     <dependencies>
@@ -73,24 +75,24 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>1.7.29</version>
+            <version>${slf4j.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-slf4j-impl</artifactId>
-            <version>2.13.2</version>
+            <version>${log4j.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-api</artifactId>
-            <version>2.13.2</version>
+            <version>${log4j.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.13.2</version>
+            <version>${log4j.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>