Update deps

go.mod

@@ -1,13 +1,17 @@
 module github.com/sethvargo/gcr-cleaner
 
-go 1.14
+go 1.15
 
 require (
-	cloud.google.com/go v0.55.0 // indirect
-	github.com/docker/cli v0.0.0-20200320120634-22acbbcc4b3f // indirect
-	github.com/gammazero/deque v0.0.0-20200310222745-50fa758af896 // indirect
-	github.com/gammazero/workerpool v0.0.0-20200311205957-7b00833861c6
-	github.com/google/go-containerregistry v0.0.0-20200320200342-35f57d7d4930
-	github.com/pkg/errors v0.9.1 // indirect
-	golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e // indirect
+	cloud.google.com/go v0.70.0 // indirect
+	github.com/docker/cli v20.10.0-beta1+incompatible // indirect
+	github.com/gammazero/deque v0.0.0-20201010052221-3932da5530cc // indirect
+	github.com/gammazero/workerpool v1.1.1
+	github.com/google/go-containerregistry v0.1.4
+	github.com/sirupsen/logrus v1.7.0 // indirect
+	golang.org/x/net v0.0.0-20201029221708-28c70e62bb1d // indirect
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 // indirect
+	golang.org/x/sys v0.0.0-20201029080932-201ba4db2418 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	gotest.tools/v3 v3.0.3 // indirect
 )