Commit fcce685

What's new in 8.3.0

Merge to

[upstream commit ad297a10ba19](https://github.com/googlei18n/libphonenumber/commit/ad297a10ba19);

relevant code changes:

- Added two new enum values to `ValidationResult` - `IS_POSSIBLE_LOCAL_ONLY` and

`INVALID_LENGTH`. Added more documentation to the existing values; see the

docstrings for when these are going to be used. Note that the API for

`is_possible_number_with_reason` has not yet been changed to return these values.

`IS_POSSIBLE_LOCAL_ONLY` will be returned for some values which currently

return `IS_POSSIBLE`, and `INVALID_LENGTH` will be returned for some values which

currently return `TOO_LONG`.

- Fix for `is_number_match` to ignore the `number_of_leading_zeros` field when comparing

numbers unless `italian_leading_zero` is `True`, and to consider default values

to match the same value when explicitly set for these two fields. This fix

shouldn't be needed for anyone correctly creating phone numbers using "parse"

as recommended.