Update seccomp KEP as implemented

The implementation is done for v1.19.0 and we now can mark this KEP as
`implemented`.

Signed-off-by: Sascha Grunert <[email protected]>

Author: saschagrunert

keps/sig-node/20190717-seccomp-ga.md

@@ -15,9 +15,9 @@ reviewers:
 approvers:
   - "@liggitt"
   - "@derekwaynecarr"
-editor: TBD
+editor: "@saschagrunert"
 creation-date: 2019-07-17
-status: implementable
+status: implemented
 ---
 
 # Seccomp to GA
@@ -85,16 +85,16 @@ checklist items _must_ be updated for the enhancement to be released.
 
 Items marked with (R) are required *prior to targeting to a milestone / release*.
 
-- [ ] (R) Enhancement issue in release milestone, which links to KEP dir in [kubernetes/enhancements] (not the initial KEP PR)
-- [ ] (R) KEP approvers have approved the KEP status as `implementable`
-- [ ] (R) Design details are appropriately documented
-- [ ] (R) Test plan is in place, giving consideration to SIG Architecture and SIG Testing input
-- [ ] (R) Graduation criteria is in place
-- [ ] (R) Production readiness review completed
-- [ ] Production readiness review approved
-- [ ] "Implementation History" section is up-to-date for milestone
-- [ ] User-facing documentation has been created in [kubernetes/website], for publication to [kubernetes.io]
-- [ ] Supporting documentation e.g., additional design documents, links to mailing list discussions/SIG meetings, relevant PRs/issues, release notes
+- [x] (R) Enhancement issue in release milestone, which links to KEP dir in [kubernetes/enhancements] (not the initial KEP PR)
+- [x] (R) KEP approvers have approved the KEP status as `implementable`
+- [x] (R) Design details are appropriately documented
+- [x] (R) Test plan is in place, giving consideration to SIG Architecture and SIG Testing input
+- [x] (R) Graduation criteria is in place
+- [x] (R) Production readiness review completed
+- [x] Production readiness review approved
+- [x] "Implementation History" section is up-to-date for milestone
+- [x] User-facing documentation has been created in [kubernetes/website], for publication to [kubernetes.io]
+- [x] Supporting documentation e.g., additional design documents, links to mailing list discussions/SIG meetings, relevant PRs/issues, release notes
 
 **Note:** Any PRs to move a KEP to `implementable` or significant changes once it is marked `implementable` should be approved by each of the KEP approvers. If any of those approvers is no longer appropriate than changes to that list should be approved by the remaining approvers and/or the owning SIG (or SIG-arch for cross cutting KEPs).