Merge branch 'release/0.8.4' into develop
Fix type errors
Merge pull request #3 from egisatoshi/develop

Fix type errors
Change rule
Support dialyzer and call-graph option
Modify dialyzer-related settings
Bump libs
Support preparing stop of workers
Modify spec of the functions
Bump leo_rpc to 0.8.5
Merge branch 'release/0.8.5'