Inline-snapshot

Feat

- support 3.12

Fix

- do not change empty snapshot if it is not used

Feat

- escaped linebreak at the start/end of multiline strings

Fix

- added py.typed

Fix

- handle update flag in sub-snapshots correctly
- fixed some edge cases where sub-snapshots had problems with some flags
- string literal concatenation should trigger no update

Fix

- added `__all__` to inline_snapshot
- flags fix/trim/create/update are changing the matching snapshots

BREAKING CHANGE

- values have to be copyable with `copy.deepcopy`

Fix

- snapshot the current value of mutable objects
python
l = [1]
assert l == snapshot([1]) old behaviour: snapshot([1, 2])
l.append(2)
assert l == snapshot([1, 2])

Fix

- black configuration files are respected