v0.4.2

Replay v0.4.2

Diff since v0.4.1

Merged pull requests:

• Update readme (#36) (@terasakisatoshi)
• format code with whitespace_in_kwargs=false (#37) (@terasakisatoshi)
• Add code style config (#38) (@terasakisatoshi)
• add FormatCheck.yml (#39) (@terasakisatoshi)
• on -> in (#40) (@terasakisatoshi)
• use 1.7 (#41) (@terasakisatoshi)
• add macOS-latest and windows-latest (#42) (@terasakisatoshi)
• add example of PythonCall (#43) (@terasakisatoshi)
• Prepare release v0.4.2 (#45) (@terasakisatoshi)