Update MAGs workflow to 0.4

[paulzierep]

FOR CONTRIBUTOR:

• I have read the Adding workflows guidelines
• License permits unrestricted use (educational + commercial)
• Please also take note of the reviewer guidelines below to facilitate a smooth review process.

Workflow updates see Changelog

[wm75]

Apart from my one comment this is looking good.

Would be nice if you could also provide readme and help in the workflow.

[wm75]

one small cosmetic thing: we usually put the release near the top of the workflow between license and wf name.

[paulzierep]

@wm75 good ?
ping @AnnaSyme this version for further updates. If you want you can fork my repo and make a PR with changes to this branch.

[AnnaSyme]

Thanks @paulzierep - I'll just send you the link to the workflow (in slack) so you can check it looks ok.

[paulzierep]

@wm75 can we merge this one ? or @mvdbeek ?

[paulzierep]

@mvdbeek the mentioned subworkflow is no longer part of the WF. The only subworkflow is the mapping over workflow of metaspedes, and there it makes sense imo since both tools are part of one conditional.
Changelog was adjusted.