Update all `dispatch('change')` to not fire unless value changed

[techniq]

• [ ] DateField
• [ ] DatePickerField
• [ ] DateRangeField
• [ ] Input
• [ ] Form
• [ ] Collapse
• [ ] Drawer
• [ ] TextField
• [x] ToggleGroup
• [ ] SelectField

[techniq]

https://github.com/techniq/svelte-ux/commit/de6f9a2018bb11c65f73fd5df1353e98dabd834b

[techniq]

For most cases, no change will be needed (just need to verify). All the $: dispatch('change', { value }) should be fine (see REPL)