message: Pin Python package dependencies more weakly
diff: -msgpack==1.0.0
  -loguru==0.5.3
  -requests==2.24.0
  -requests-http-signature==0.2.0
  -websocket-client==0.57.0
  -cryptography==3.2
  +msgpack >= 1.0, == 1.*
  +loguru >= 0.5, == 0.*
  +requests >= 2.24, == 2.*
  +requests-http-signature >= 0.2, == 0.*
  +websocket-client >= 0.57, == 0.*
  +cryptography >= 3.2, == 3.*
  