Added Support for Middleware Functions in piral-fetch

[manuelroemer]

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• Bug fix (non-breaking change which fixes an issue, please reference the issue id)
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Description

Implements the proposed piral-fetch middleware changes from #645. See the issue for details.

Remarks

None.

[FlorianRappl]

LGTM - we still need an entry in the CHANGELOG.md (this is for the new 1.4.1 - so a new entry is needed; first pull from documentation to have the most recent develop branch)

[manuelroemer]

Ok, will do. IIRC the next title in the changelog should then be ## 1.4.1 (tbd), right? Let me know if not. ;)

[FlorianRappl]

Ok, will do. IIRC the next title in the changelog should then be ## 1.4.1 (tbd), right? Let me know if not. ;)

Yes that is right