Dsmr-parser

- added E.ON Hungary; refactored DSMR specifications to fix obis reference conflicts (`PR 137 <https://github.com/ndokter/dsmr_parser/pull/137>`_ by `balazs92117 <https://github.com/balazs92117>`_)

- EQUIPMENT IDENTIFIER is wrong for Fluvius meters when other mbus devices are present (`PR 133 <https://github.com/ndokter/dsmr_parser/pull/133>`_ by `ejpalacios <https://github.com/ejpalacios>`_)

- Fix parsing tests and line start matching (`PR 132 <https://github.com/ndokter/dsmr_parser/pull/132>`_ by `dupondje <https://github.com/dupondje>`_)

- Improve performance. Thanks to `ejpalacios <https://github.com/bdraco>`_ (`PR #130 <https://github.com/ndokter/dsmr_parser/pull/130>`_ by `ndokter <https://github.com/ndokter>`_)

- Bug/duplicate index BELGIUM_MAXIMUM_DEMAND_13_MONTHS (`PR 129 <https://github.com/ndokter/dsmr_parser/pull/129>`_ by `ejpalacios <https://github.com/ejpalacios>`_)

- Improved gas meter (mbus devices) support and replaced Telegram dictionary with backwards compatible object (`PR 121 <https://github.com/ndokter/dsmr_parser/pull/121>`_ by `ndokter <https://github.com/ndokter>`_)
- Fix parsing with invalid timestamps (`PR 125 <https://github.com/ndokter/dsmr_parser/pull/125>`_ by `dupondje <https://github.com/dupondje>`_)
- Add Iskra IE.x meters specification (`PR 126 <https://github.com/ndokter/dsmr_parser/pull/126>`_ by `jchevalier7 <https://github.com/jchevalier7>`_)