:art: #1631 SDK最低支持版本设置为JDK8，放弃对JDK7及更旧版本的支持

pom.xml

@@ -116,8 +116,8 @@
   </modules>
 
   <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>
     <httpclient.version>4.5</httpclient.version>
@@ -131,11 +131,10 @@
         <artifactId>qrcode-utils</artifactId>
         <version>1.1</version>
       </dependency>
-      <!-- 由于jodd-http较新的3.8版本需要jdk8，故而此处采用较低版本 -->
       <dependency>
         <groupId>org.jodd</groupId>
         <artifactId>jodd-http</artifactId>
-        <version>5.1.4</version>
+        <version>5.1.6</version>
         <scope>provided</scope>
       </dependency>
       <dependency>