Upgrade dependencies

Use go get -u to upgrade dependencies.

Signed-off-by: Will Beason <willbeason@google.com>

constraint/Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.15 as builder
+FROM golang:1.16 as builder
 
 RUN apt-get update &&\
     apt-get install -y apt-utils make
@@ -21,11 +21,6 @@ RUN curl -L -O "https://github.com/kubernetes-sigs/kustomize/releases/download/v
     mv kustomize_${version}_linux_${arch} /usr/bin/kustomize &&\
     chmod u+x /usr/bin/kustomize
 
-# Install OPA
-WORKDIR /usr/bin
-RUN curl -L -o opa https://github.com/open-policy-agent/opa/releases/download/v0.10.5/opa_linux_amd64 &&\
-    chmod 755 opa
-
 # Copy in the go src
 WORKDIR /go/src/github.com/open-policy-agent/frameworks/constraint
 COPY .    .

constraint/go.mod

@@ -1,33 +1,40 @@
 module github.com/open-policy-agent/frameworks/constraint
 
-go 1.13
+go 1.16
 
 require (
-	github.com/OneOfOne/xxhash v1.2.8 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d // indirect
 	github.com/davecgh/go-spew v1.1.1
-	github.com/go-openapi/spec v0.19.5 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/google/go-cmp v0.5.2
-	github.com/kr/text v0.2.0 // indirect
-	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
-	github.com/onsi/gomega v1.10.2
-	github.com/open-policy-agent/opa v0.24.0
+	github.com/go-openapi/spec v0.20.3 // indirect
+	github.com/go-openapi/swag v0.19.15 // indirect
+	github.com/golang/glog v0.0.0-20210429001901-424d2337a529
+	github.com/google/go-cmp v0.5.6
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/imdario/mergo v0.3.12 // indirect
+	github.com/json-iterator/go v1.1.11 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/onsi/gomega v1.10.5
+	github.com/open-policy-agent/opa v0.29.4
 	github.com/pkg/errors v0.9.1
-	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
-	github.com/spf13/cobra v1.1.1
+	github.com/prometheus/client_golang v1.10.0 // indirect
+	github.com/prometheus/common v0.25.0 // indirect
+	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
+	github.com/spf13/cobra v1.1.3
 	github.com/spf13/pflag v1.0.5
-	golang.org/x/mod v0.3.1-0.20200828183125-ce943fd02449 // indirect
-	golang.org/x/net v0.0.0-20210224082022-3d97a244fca7
-	golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073 // indirect
-	golang.org/x/tools v0.1.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	golang.org/x/net v0.0.0-20210525063256-abc453219eb5
+	golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c // indirect
+	golang.org/x/sys v0.0.0-20210601080250-7ecdf8ef093b // indirect
+	golang.org/x/term v0.0.0-20210503060354-a79de5458b56 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c // indirect
 	k8s.io/apiextensions-apiserver v0.20.2
 	k8s.io/apimachinery v0.20.2
 	k8s.io/client-go v0.20.2
-	k8s.io/klog/v2 v2.8.0 // indirect
-	k8s.io/kube-openapi v0.0.0-20210305001622-591a79e4bda7 // indirect
-	sigs.k8s.io/controller-runtime v0.8.2
-	sigs.k8s.io/structured-merge-diff/v4 v4.1.0 // indirect
+	k8s.io/klog/v2 v2.9.0 // indirect
+	k8s.io/kube-openapi v0.0.0-20210527164424-3c818078ee3d // indirect
+	k8s.io/utils v0.0.0-20210527160623-6fdb442a123b // indirect
+	sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.19 // indirect
+	sigs.k8s.io/controller-runtime v0.8.3
+	sigs.k8s.io/structured-merge-diff/v4 v4.1.1 // indirect
 )