Fixes compatibility with current toolkit (upcoming 2.4).
Now uses strict types.
No more use travis and codeclimate and use github actions as all other repos.
No more clumsy, permanent SQLite DB needed while testing - now tests in memory.
Fixes model/entity load issues in tests.
Fix demo script (which still is quite useless, but at least will not throw anymore).
Fixes compatibility with current toolkit (upcoming 2.4). Now uses strict types. No more use travis and codeclimate and use github actions as all other repos. No more clumsy, permanent SQLite DB needed while testing - now tests in memory. Fixes model/entity load issues in tests. Fix demo script (which still is quite useless, but at least will not throw anymore).