[FEATURE] Custom Middleware Extensibility: Allow multiple definitions of the same custom middleware

[RandomByte]

Similar to the implementation for custom tasks:
https://github.com/SAP/ui5-builder/blob/d60c67dafc6d96a8345da2004972cd4b839eece6/lib/types/AbstractBuilder.js#L81-L89

Resolves #222

[coveralls]

Coverage increased (+0.02%) to 93.509% when pulling b59b6c1 on allow-same-name-custom-middleware-configurations into 1188029 on master.

[vobu]

was looking fwd to this for quite a while :)
gave it a shot immediately via
https://github.com/petermuessig/ui5-ecosystem-showcase/blob/c8cfc38e22c72ef293ff3cb175bf79e3cb9c97f1/packages/ui5-app/package.json#L39
and
https://github.com/petermuessig/ui5-ecosystem-showcase/blob/c8cfc38e22c72ef293ff3cb175bf79e3cb9c97f1/packages/ui5-app/ui5.yaml#L29
but
yarn dev then bails with
Error: middlewareRepository: Unknown Middleware ui5-middleware-simpleproxy--1

Am I doing sth wrong?

[RandomByte]

Thanks for testing this right away @vobu!

That was my bad. Fix coming right up!

[petermuessig]

@vobu thanks for requesting! we can adopt the ecosystem showcase then - @RandomByte thanks for featuring! :-)

[vobu]

Thanks for testing this right away @vobu!

That was my bad. Fix coming right up!

confirmed: it's ALIVE 🧟‍♂️ !!! :)

as soon as this is alive, I'll PR the showcase @petermuessig