update pom.xml.

升级fastjson版本到1.2.83，1.2.83版本之前存在代码执行漏洞风险 ，CVE-2022-25845	
Signed-off-by: Ntest <531648642@qq.com>

pom.xml

@@ -60,7 +60,7 @@
     <simple-http.version>1.0.5</simple-http.version>
     <lombok-version>1.18.20</lombok-version>
     <junit-version>4.13.2</junit-version>
-    <fastjson-version>1.2.78</fastjson-version>
+    <fastjson-version>1.2.83</fastjson-version>
     <alipay-sdk-version>4.17.5.ALL</alipay-sdk-version>
     <jacoco-version>0.8.2</jacoco-version>
   </properties>