Update Epsilon to a more recent version (2.4.0)

[jameswpm]

Eclipse version: Eclipse Modeling Tools Version: 2022-12 (4.26.0)

EMF Views version: 0.4.0

Branch (when relevant): master

Repeatable: Always

Problem description:

Altough EMF Views is just slightly dependent on Epsilon, being used just in the optional delegator, it relies on an old version of Epsilon (1.5). Automatic update of Epsilon dependency code causes compilation errors.

Steps to repeat: N/A

[jameswpm]

The Epsilon was updated to version 2.4.0 in the branch AIDOaRt, but it includes a minor workaround due to a possible bug on the Epsilon library.

The issue will be closed when changes are merged into the master branch.

For the possible bug in the Epsilon library, please refer to the issue in the Epsilon repository

Main affected files: /org.atlanmod.emfviews.virtuallinksepsilondelegate/src/org/atlanmod/emfviews/virtuallinksepsilondelegate/EclDelegate.java