Update notes for submitted changes
* Update eclipse-jarsigner-plugin to 1.1.7
* Update build-helper-maven-plugin to 3.2.0
* Update maven-enforcer-plugin to 3.0.0-M3
* Update maven-shade-plugin to 3.2.4
* Require latest Maven version 3.6.3
* Update spring-boot-maven-plugin to 2.4.1
* Update maven-surefire plugins to 3.0.0-M5
* Update japicmp-maven-plugin to 0.14.4
* Update spotbugs-maven-plugin to 4.1.4
* Upgrade ecj to 3.24.0
* Upgrade wagon-ssh to 3.4.2; align maven-site-plugin
Gerrit Code Review @ Eclipse.org