v0.6.1 - refresh aged discovery answers without holding the fetcher lock

v0.6.0 - resolve resource kinds through API discovery

v0.5.4 - report only NotFound fetch errors as new resources

v0.5.3 - errors exit 2 as documented, without a usage dump

release v0.5.2

v0.5.1 - a throttled watch re-run is deferred, not dropped