Ipinfo

- The SDK version is available via `ipinfo.version` as `SDK_VERSION`.
- Most private functions on all handlers (i.e. those that start with `_`) are
now moved to `ipinfo.handler_utils`.
- All constants that existed on handlers (i.e. `REQUEST_TIMEOUT_DEFAULT`) are
now moved to `ipinfo.handler_utils`.
- Cache behavior for the synchronous handler is a bit different now; the item
actually cached is the item _after_ formatting is complete, rather than
before.
- Both the sync and async handlers have the following improvements:
- `timeout` can be specified as a keyword-arg to getDetails to optionally
override the client-level timeout.
- getBatchDetails now has no limit to the size of the `ip_addresses` input
list. It will chunk the list internally and make requests against the
batch endpoint in a way that doesn't exceed the API's own limits.
- getBatchDetails now accepts the new options `batch_size`,
`timeout_per_batch`, `timeout_total` and `raise_on_fail`. Please see the
documentation for details on what each of these do.

Breaking Changes

- [PR 32](https://github.com/ipinfo/python/pull/32)
All EOL Python versions are no longer supported; currently, Python 3.6 or
greater is now **required**.
An asynchronous handler is available from `getHandlerAsync` which returns an
`AsyncHandler` which uses **aiohttp**.

Breaking Changes

- [PR 19](https://github.com/ipinfo/python/pull/19)
DefaultCache requires keyword arguments now instead of positional arguments,
in particular `maxsize` and `ttl`.

Bug Fix

- [PR 19](https://github.com/ipinfo/python/pull/19)
[Issue 18](https://github.com/ipinfo/python/issues/18)
An issue with the handler not being created if you provide your own custom
`maxsize`/`ttl` values has been fixed.

General

- Released a batch ops function on the handler called `getBatchDetails` which
accepts a list of IP addresses (or an IP address plus a path to more specific
details, e.g. `8.8.8.8/country`). See documentation on batch operations in the
README for more details.

Breaking Changes

- Fix [Issue 8](https://github.com/ipinfo/python/issues/8).
Deleted the `ip_address` key in the details object which was of type [`IPv4Address`](https://docs.python.org/3/library/ipaddress.html).

This allows serializing the details object (into JSON or something else) without errors by default.

Users who expected that object type can simply pull the `ip` key instead and turn it into an [`IPv4Address`](https://docs.python.org/3/library/ipaddress.html)
object on their own.