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

Update pyproject.toml

See merge request !313