Bump k8s.io/apimachinery from 0.18.6 to 0.20.4

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.18.6 to 0.20.4.
- [Release notes](https://github.com/kubernetes/apimachinery/releases)
- [Commits](kubernetes/apimachinery@v0.18.6...v0.20.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_golang v1.7.1 // indirect
 	k8s.io/api v0.20.2
-	k8s.io/apimachinery v0.20.2
+	k8s.io/apimachinery v0.20.4
 	k8s.io/client-go v0.20.2
 	k8s.io/klog v1.0.0 // indirect
 	sigs.k8s.io/controller-runtime v0.8.3

go.sum

@@ -825,6 +825,8 @@ k8s.io/apimachinery v0.18.6/go.mod h1:OaXp26zu/5J7p0f92ASynJa1pZo06YlV9fG7BoWbCk
 k8s.io/apimachinery v0.20.1/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
 k8s.io/apimachinery v0.20.2 h1:hFx6Sbt1oG0n6DZ+g4bFt5f6BoMkOjKWsQFu077M3Vg=
 k8s.io/apimachinery v0.20.2/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
+k8s.io/apimachinery v0.20.4 h1:vhxQ0PPUUU2Ns1b9r4/UFp13UPs8cw2iOoTjnY9faa0=
+k8s.io/apimachinery v0.20.4/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
 k8s.io/apiserver v0.18.6/go.mod h1:Zt2XvTHuaZjBz6EFYzpp+X4hTmgWGy8AthNVnTdm3Wg=
 k8s.io/apiserver v0.20.1/go.mod h1:ro5QHeQkgMS7ZGpvf4tSMx6bBOgPfE+f52KwvXfScaU=
 k8s.io/client-go v0.18.6 h1:I+oWqJbibLSGsZj8Xs8F0aWVXJVIoUHWaaJV3kUN/Zw=