fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMALIBABA-570967
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-559346

pom.xml

@@ -8,7 +8,7 @@
  <name>shop Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <properties>
- <spring.version>5.1.7.RELEASE</spring.version>
+ <spring.version>5.1.13.RELEASE</spring.version>
  <aop.version>1.8.10</aop.version>
  <mybatis.version>3.4.1</mybatis.version>
  <log4j.version>1.2.17</log4j.version>
@@ -152,7 +152,7 @@
  <dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>fastjson</artifactId>
- <version>1.2.25</version>
+ <version>1.2.69</version>
  </dependency>
  <!--protostuff，用于序列化和反序列化-->
  <!--<dependency>-->