libsigscan-0~20191221-bp153.1.18

- remove python2 submodule

- update to 20191221
  * Worked on Python wheel support
  * Applied updates and changes for libcdata
- introduced %{experimental_tag}
- required for recent releases of python-dfVFS

- update to v20190103
  * Worked on Python bindings

- add python3 binding subpackage

- update to v20170124
  * fixed bug in scan tree initialization
  * applied updates
  * fixes for rpmbuild
  * worked on Python 3 support
  * worked on Python bindings
  * worked on setup.py
  * bug fixes

- update to v20150627
  * required by plaso v1.3
  * worked on Python bindings
  * fixes in sigscan.conf
- update url field to point to github
- for the python sub-package add a Requires libsigscan

- initial package v20150125