Bump github.com/google/go-cmp from 0.5.6 to 0.5.7 (#609)

Bumps [github.com/google/go-cmp](https://github.com/google/go-cmp) from 0.5.6 to 0.5.7.
- [Release notes](https://github.com/google/go-cmp/releases)
- [Commits](google/go-cmp@v0.5.6...v0.5.7)

---
updated-dependencies:
- dependency-name: github.com/google/go-cmp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/go-openapi/validate v0.20.3
 	github.com/go-playground/validator/v10 v10.10.0
 	github.com/golang/glog v0.0.0-20210429001901-424d2337a529 // indirect
-	github.com/google/go-cmp v0.5.6
+	github.com/google/go-cmp v0.5.7
 	github.com/google/rpmpack v0.0.0-20210518075352-dc539ef4f2ea
 	github.com/google/trillian v1.4.0
 	github.com/in-toto/in-toto-golang v0.3.4-0.20211211042327-af1f9fb822bf

go.sum

@@ -811,8 +811,9 @@ github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.3/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
+github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
 github.com/google/go-containerregistry v0.7.1-0.20211118220127-abdc633f8305 h1:4upgCb+N0/tewaAT+rPGk8zuKCG1hOoICHvFMxy1CMQ=
 github.com/google/go-containerregistry v0.7.1-0.20211118220127-abdc633f8305/go.mod h1:6cMIl1RfryEiPzBE67OgtZdEiLWz4myqCQIiBMy3CsM=
 github.com/google/go-github/v28 v28.1.1/go.mod h1:bsqJWQX05omyWVmc00nEUql9mhQyv38lDZ8kPZcQVoM=