Merge pull request #111 from weikang9009/master update dependency versions
Merge pull request #99 from weikang9009/v220 Prepare for release 2.2.0
Merge pull request #85 from weikang9009/master Prepare for release 2.1.0
Merge pull request #67 from weikang9009/rel2.0.0 REL: 2.0.0
Merge pull request #57 from weikang9009/release add changelog for the release 1.2.0
Merge pull request #37 from weikang9009/master add docstring for categorical spatial Markov