fix for response when xdata is present but not K

v3.0.0beta-11

fix response when xdata present but not K

fixed some serialization bugs

v3.0.0beta-9

fixed some serialization

fixes for python 3.8

v3.0.0beta-10

test only 3.8 and 3.9

Fix for #12 events with multiple xdata fields

v3.0.0beta-8

added support for multiple xdata fields #12

Adding parsing flags

The parsing flags make sure that a Event that gets created from a dict (or directly through the init) doesn't unnecessarily reparse the encrypted content, content, sia_code and adm_cid.

Small tweak in the regex

v3.0.0beta-6

small tweak in regex

Small fixes in the regex

Small fix in the regex to allow . characters.

Small fixes with the dataclass_json

Small fix in the regex, dealing with special characters.
Added dataclass_json to other dataclasses and made sure to exclude the binary key and sia_account.

added dataclasses_json to event

events can now be turned into a dict, and back using event.to_dict() and SIAEvent.from_dict()

Small updates to first beta

v3.0.0beta-2

updated devcontainer and delete log line