Upgrade to Eclipse 2021-03
Upgrade to latest Eclipse. We currently are based on Eclipse 2020-06. This must be done together with upgrading to a newer Java version (see #29 (closed)), as Eclipse 2020-09 and higher require Java 9 or higher, and we still use Java 8.
We need to upgrade to get add a JustJ JDK to our product, see #30 (closed).