v0.15.1

Lazy v0.15.1

Diff since v0.15.0

Merged pull requests:

• Install TagBot as a GitHub Action (#116) (@JuliaTagBot)
• fix getindex error for list[unitrange] case (#117) (@aviatesk)
• try to avoid stackoverflow on length (#118) (@aviatesk)
• bump version, rm Manifest.toml (#119) (@aviatesk)