Release 0.4.3-1

0.4.3-1

• fix cross-platform building (buildx)
• update dependency: cryptography 3.3.2-><3.5

0.4.3

• make docker image leaner (reduced to 10% of its original size; thanks @BrutuZ
• update dependencies:
  cherrypy 18.6.0->18.6.1
  requests 2.25.1->2.26.0
  libsass 0.20.1->0.21.0
  jinja2 2.11.3->3.0.3
  PyGithub 1.54.1->1.55
  certifi 2020.12.5->2021.10.8
  cffi 1.14.5->1.15.0