v0.4.0
Updates supported Go versions to 1.16, 1.17 and 1.18.
Adds a Shutdown function that attempts to insure buffered metrics are flushed to the underlying sink for short-lived processes. See #132 and #134.
Note that Shutdown was initially added and released as a 0.3.11 but contained a breaking change for library users that have their own MetricsSink
implementation since it added an interface method.
This release retracts the 0.3.11 release and re-introduces the Shutdown
change in a backwards compatible manner. See #134.