1.12.dev*: conflict between new HAL parsing helpers and new pagination helpers

[gernot-h]

Unfortunately, @GMishx and myself worked more or less in parallel on core helpers for returning data:

• In Convenience functions for HAL _embedded and _links parsing #54, I added helper functions which introduced a new class SW360Response returned instead of plain dicts with some HAL helper functions. SW360Response is derived from dict, so it's fully backward-compatible for callers.
• In feat(projects): update API calls to new v20 style #56, @GMishx added the new api_get_all() pagination helper while my changes were still sitting in the PR, so his work is certainly unaware of my changes and aggregates the data into a plain dict

So basically, the user will now get plain dicts for paginated REST endpoints when talking to a v20 server and SW360Response objects when talking to a v18 server.

I think we need to fix this in one or the other way before releasing v1.12, otherwise it's quite inconsistent. I will try to suggest a fix within the next few days...