Allow any Sequence in execute methods

[egerke28]

Resolves #17 by allowing any Sequence types in execute methods on both asqlite.Connection and asqlite.Cursor as in sqlite3.

[Rapptz]

Sorry for the late response but this change isn't correct depending on the Python version. isinstance on Sequence requires collections.abc.Sequence instead of just typing.Sequence, which may be an alias to collections.abc.Sequence depending on the version of Python used.

Likewise, when used as a type signature you generally want to be explicit with the generic parameter a la Sequence[Any] instead of letting it become whatever the default is (which is Any, but e.g. pyright uses Unknown as a default)