Update pom.xml

Author: binarywang

pom.xml

@@ -10,8 +10,8 @@
     <url>https://github.com/binarywang/java-generator</url>
 
     <properties>
-        <maven.compiler.source>1.7</maven.compiler.source>
-        <maven.compiler.target>1.7</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <downloadJavadocs>true</downloadJavadocs>
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>19.0</version>
+            <version>24.1.1</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>