Update spring core to v5.3.7

Author: renovate-bot

spring/pom.xml

@@ -13,7 +13,7 @@
 
     <properties>
         <project.Automatic-Module-Name>io.cucumber.spring</project.Automatic-Module-Name>
-        <spring.version>5.3.6</spring.version>
+        <spring.version>5.3.7</spring.version>
         <javax.servlet-api.version>4.0.1</javax.servlet-api.version>
     </properties>