Merge pull request #163 from zalando-nakadi/dependabot/maven/nakadi-producer/org.springframework-spring-core-5.3.20

Bump spring-core from 5.3.12 to 5.3.20 in /nakadi-producer

Author: Paŭlo Ebermann

nakadi-producer/pom.xml

@@ -86,7 +86,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>5.3.12</version>
+            <version>5.3.20</version>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>