Merge pull request Wechat-Group#32 from Wechat-Group/dependabot/maven/org.springframework-spring-core-5.3.20

Bump spring-core from 5.3.19 to 5.3.20

Author: binarywang

pom.xml

@@ -21,7 +21,7 @@
  <WxJava.version>4.3.0</WxJava.version>
  <junit.version>4.13.1</junit.version>
  <slf4j.version>1.7.21</slf4j.version>
- <spring.version>5.3.19</spring.version>
+ <spring.version>5.3.20</spring.version>
  <freemarker.version>2.3.23</freemarker.version>
  <commons.fileupload.version>1.3.3</commons.fileupload.version>
  <commons.codec.version>1.9</commons.codec.version>