Dsmr-parser

- CRC checksum verification for DSMR v4 telegrams (`issue 10 <https://github.com/ndokter/dsmr_parser/issues/10>`_)

- DSMR v2.2 serial settings now uses parity serial.EVEN by default (`PR 5 <https://github.com/ndokter/dsmr_parser/pull/5>`_)
- improved asyncio reader and improve it's error handling (`PR 8 <https://github.com/ndokter/dsmr_parser/pull/8>`_)

- asyncio reader for non-blocking reads (`PR 3 <https://github.com/ndokter/dsmr_parser/pull/3>`_)

- support for DMSR version 2.2 (`PR 2 <https://github.com/ndokter/dsmr_parser/pull/2>`_)

- initial version with a serial reader and support for DSMR version 4.x