Release 0.61.0

Features

• Add ability to set a custom subnet when creating a nodegroup (#4025 #4044)
• Expose nodegroup container runtime configuration (#4051)

Bug Fixes

• Fix panic when creating a nodegroup with instance selector options (#3993)
• Fix panic when VPC config is missing (#4056)

Acknowledgments

Weaveworks would like to sincerely thank:
@NaivePa, @peterfication and @SharpThunder