go-ipfix v0.7.0

Changed

• Upgrade Go to v1.21, as Go v1.19 is no longer maintained. (#317, @antoninbas)
• Replace github.com/golang/mock with go.uber.org/mock, as github.com/golang/mock is no longer maintained. (#316, @antoninbas)

Fixed

• Fix collector klog flag not supported error by adding registration of the flag. (#311, @heanlan)