Allow static/abstract classifier also for official UML syntax

[skogsbaer]

:bookmark_tabs: Summary

Previously, the static classifier was only supported for attributes using the syntax String name$. Now you can also write name: String$

Further, it was confusing that static/abstract classifiers for methods had to be written after the closing parenthesis of the method signature, even if the method has a return type. So you had to write foo(name: String)* int.

This commit also adds the possibility of writing the classifier at the very end, as in foo(name: String) int*.

See PR #2269 and issue #3001 and my old issue #1953

:straight_ruler: Design Decisions

No real design desicions had to be made. I added new unit tests and made sure that all old tests are running.

:clipboard: Tasks

Make sure you

• [ x] :book: have read the contribution guidelines
• [x ] :computer: have added unit/e2e tests (if appropriate)
• [x ] :bookmark: targeted develop branch

[skogsbaer]

I'm happy to fix the conflicts, but I suggest a review first.

[skogsbaer]

@ashishjain0512 Any hints how to add new rendering test cases? The developer documentation (https://mermaid-js.github.io/mermaid/#/development, section "Add E2E tests") explain how to run cypress and how to add test cases but does not explain how to provide the expected images.

[skogsbaer]

@ashishjain0512 I tried adding the tests but it seems that some of them are broken. For example, test 19 in cypress/integration/rendering/classDiagram.spec.js has a syntax error, although I did not change anything:

[jgreywolf]

I am closing this since the changes were included in PR #4303