v0.27.0

[timothysmith0609]

What are you trying to accomplish with this PR?
Cut a release that includes:

• -f support (kubectl -f-style support for deploy task #514)
• Add ServiceAccount, PodTemplate, ReplicaSet, Role, and RoleBinding to prune whitelist (Add more targets to prune whitelist #498)
• Initial implementation of shared validations for tasks (First pass at shared validation #533)
• Better usage of require statements for tasks. We no longer require code we don't need for a given task. (Easier ruby use #487)

How is this accomplished?
Bump version followed by Shipit deploy once this merges

What could go wrong?
Let's do a bit of tophatting before releasing this and make sure everything we want it in the changelog

cc @Shopify/production-excellence