bump crypto to 0.8.3 and go mod tidy

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/smallstep/nosql v0.3.6
 	github.com/urfave/cli v1.22.4
 	go.step.sm/cli-utils v0.2.0
-	go.step.sm/crypto v0.8.0
+	go.step.sm/crypto v0.8.3
 	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897
 	golang.org/x/net v0.0.0-20210119194325-5f4716e94777
 	google.golang.org/api v0.33.0

go.sum

@@ -322,8 +322,8 @@ go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
 go.step.sm/cli-utils v0.2.0 h1:hpVu9+6dpv/7/Bd8nGJFc3V+gQ+TciSJRTu9TavDUQ4=
 go.step.sm/cli-utils v0.2.0/go.mod h1:+t4qCp5NO+080DdGkJxEh3xL5S4TcYC2JTPLMM72b6Y=
 go.step.sm/crypto v0.6.1/go.mod h1:AKS4yMZVZD4EGjpSkY4eibuMenrvKCscb+BpWMet8c0=
-go.step.sm/crypto v0.8.0 h1:S4qBPyy3hR7KWLybSkHB0H14pwFfYkom4RZ96JzmXig=
-go.step.sm/crypto v0.8.0/go.mod h1:+CYG05Mek1YDqi5WK0ERc6cOpKly2i/a5aZmU1sfGj0=
+go.step.sm/crypto v0.8.3 h1:TO/OPlaUrYXhs8srGEFNyL6OWVQvRmEPCUONNnQUuEM=
+go.step.sm/crypto v0.8.3/go.mod h1:+CYG05Mek1YDqi5WK0ERc6cOpKly2i/a5aZmU1sfGj0=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=