build(deps): Bump github.com/google/trillian from 1.6.1 to 1.7.0

Bumps [github.com/google/trillian](https://github.com/google/trillian) from 1.6.1 to 1.7.0.
- [Release notes](https://github.com/google/trillian/releases)
- [Changelog](https://github.com/google/trillian/blob/master/CHANGELOG.md)
- [Commits](google/trillian@v1.6.1...v1.7.0)

---
updated-dependencies:
- dependency-name: github.com/google/trillian
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/go-openapi/validate v0.24.0
 	github.com/google/go-cmp v0.6.0
 	github.com/google/rpmpack v0.6.0
-	github.com/google/trillian v1.6.1
+	github.com/google/trillian v1.7.0
 	github.com/in-toto/in-toto-golang v0.9.0
 	github.com/jedisct1/go-minisign v0.0.0-20211028175153-1c139d1cc84b
 	github.com/mitchellh/go-homedir v1.1.0

go.sum

@@ -231,8 +231,8 @@ github.com/google/rpmpack v0.6.0/go.mod h1:uqVAUVQLq8UY2hCDfmJ/+rtO3aw7qyhc90rCV
 github.com/google/s2a-go v0.1.8 h1:zZDs9gcbt9ZPLV0ndSyQk6Kacx2g/X+SKYovpnz3SMM=
 github.com/google/s2a-go v0.1.8/go.mod h1:6iNWHTpQ+nfNRN5E00MSdfDwVesa8hhS32PhPO8deJA=
 github.com/google/subcommands v1.2.0/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
-github.com/google/trillian v1.6.1 h1:jWU5BGz24GQ5IsHNr+qbmISLkt+73jLv8BOIPN8RtD4=
-github.com/google/trillian v1.6.1/go.mod h1:TvwtNkJViJgWZ5VmAMXDwsTjzPBHaPjQO85Kt37JPmM=
+github.com/google/trillian v1.7.0 h1:Oib7mKRvZ0Z3GjvNcn2C4clRmFouEOkBcbzw7q8JlFI=
+github.com/google/trillian v1.7.0/go.mod h1:JMp1zzzHe7j2m9m8P/eTWOaoon3R/SwgqUnFMhm4vfw=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=