[BUG] "generate models java" without packageName hangs

[coekie]

Describe the bug.

Running asyncapi generate models java foo.yml, without the required --packageName argument correctly prints an error, but then the cli incorrectly indicates it is still generating models, but hangs (until killed, e.g. with ctrl-C).

Expected behavior

Print an error and exit

Screenshots

Error: In order to generate models to Java, we need to know which package they are under. Add `--packageName=PACKAGENAME` to set the desired package name.
◒  Generating models...

How to Reproduce

Run asyncapi generate models java foo.yml

🥦 Browser

None

👀 Have you checked for similar open issues?

• I checked and didn't find similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue ?

No, someone else can work on it

[github-actions]

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