v13.1.0

[13.1.0] - 2021-01-24

Changed

• fix: push client attempting to write Promise (fixes #390)
• types: improve type checking of labels
• fix: Summary#observe should throw when adding additional labels to labelset (fixes #262)

Added

• feat: added the ability to pass labels as an object to labels() and remove()
• Added: More examples with commented output