sh> operator of the Digdag v0.10.0 on Windows platform

[hiroyuki-sato]

Relates to #1540

The sh> operator on the Digdag 0.10.0 doesn't work correctly on a Windows Platform.

@hundyhundy investigated this issue. This article was written in Japanese In summary, It needs to change script name like runner.ps1 instead of runner.sh when Digdag uses PowerShell. https://github.com/treasure-data/digdag/blob/42ea7cb71270957ea6424c2df88dd7c65d248789/digdag-standards/src/main/java/io/digdag/standards/operator/ShOperatorFactory.java#L136

Workaround: Windows user uses 0.9.42 until fix this issue.

Ref: twitter