fix[litemall-db]:数据库的连接增加allowPublicKeyRetrieval配置，否则MySQL8会报错

deploy/litemall/application-db.yml

@@ -7,7 +7,7 @@ pagehelper:
 spring:
   datasource:
     druid:
-      url:  jdbc:mysql://localhost:3306/litemall?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&verifyServerCertificate=false&useSSL=false
+      url:  jdbc:mysql://localhost:3306/litemall?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&allowPublicKeyRetrieval=true&verifyServerCertificate=false&useSSL=false
       driver-class-name:  com.mysql.jdbc.Driver
       username:  litemall
       password:  litemall123456

litemall-db/src/main/resources/application-db.yml

@@ -7,7 +7,7 @@ pagehelper:
 spring:
   datasource:
     druid:
-      url:  jdbc:mysql://localhost:3306/litemall?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&verifyServerCertificate=false&useSSL=false
+      url:  jdbc:mysql://localhost:3306/litemall?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&allowPublicKeyRetrieval=true&verifyServerCertificate=false&useSSL=false
       driver-class-name:  com.mysql.jdbc.Driver
       username:  litemall
       password:  litemall123456