test(regex): Extend test to catch signature error on GNUNET_REGEX_announce
fix(regex): Fixes a bug in GNUNET_REGEX_announce_with_key where uninitialised buffer where used as EdDSA keys

Closes #8
Merge pull request #9 from vsaw/8-GNUNET_REGEX_announce_with_key-regression-fix

8 gnunet regex announce with key regression fix