Fix select-timetable value prop type

See merge request !334

Timetable.vue binds an object to select-timetable v-model.

Fix tests with Core 4.0.0.dev2

See merge request !332

Resolve "Adapt to Core 4.0"

Closes #210

See merge request !307

Update tox.ini

See merge request !316

Update .dev-js/package.json

See merge request !325

Update pyproject.toml

See merge request !323

Update .gitignore

See merge request !324

Update pyproject.toml

See merge request !322

Update package.json

See merge request !317