Bluez-peripheral

What's Changed
* Added functions to get/ set pairing and discovery properties (Thanks to ykharuzhy) https://github.com/spacecheese/bluez_peripheral/pull/43

**Full Changelog**: https://github.com/spacecheese/bluez_peripheral/compare/0.2.0a1...0.2.0a2

Note that this is an **unstable pre-release version**. The [full release](https://github.com/spacecheese/bluez_peripheral/milestone/1) is expected to introduce further breaking changes.

* Doc improvements 19
* Set default Advertisement.timeout of 0 (suspected broken with some bluez versions 37) 28
* Support for async attributes 21
* Support advertising callback 22
* Refactor BTUUID to UUID16 23
* Convert advert serviceData to a{sv} 35
* Handle introspection errors when looking for adapters (Thanks to jcapona) 41
* Fix typo and remove star imports in examples 40 (Thanks to jcapona)

**Full Changelog**: https://github.com/spacecheese/bluez_peripheral/compare/0.1.7...0.2.0a1

- Fix spelling of characteristic ENCRYPT_WRITE flag and add docstrings for ENCRYPT_READ and ENCRYPT_WRITE 16 (Thanks to Martwall)

- Fix Characteristic/ Descriptor type checking 13 (Thanks to sroebert)

- Fix advertisment and conversion of services and attributes with non 16-bit uuids https://github.com/spacecheese/bluez_peripheral/issues/7 (Thanks to rpardini)
- Fix characteristic writing when both READ and WRITE flags are used https://github.com/spacecheese/bluez_peripheral/issues/8 (Thanks to ubicore)

Fix versioning issues when pushing pypi releases (functionally identical to 0.1.3)