Use the merkle package under the released tag (#2734)

go.mod

@@ -28,7 +28,7 @@ require (
 	github.com/pseudomuto/protoc-gen-doc v1.5.1
 	github.com/spf13/cobra v1.4.0 // indirect
 	github.com/stretchr/testify v1.7.1 // indirect
-	github.com/transparency-dev/merkle v0.0.0-20220427153749-09877c5f5967
+	github.com/transparency-dev/merkle v0.0.1
 	github.com/urfave/cli v1.22.7 // indirect
 	go.etcd.io/etcd/client/v3 v3.5.4
 	go.etcd.io/etcd/etcdctl/v3 v3.5.4

go.sum

@@ -814,8 +814,8 @@ github.com/tmc/grpc-websocket-proxy v0.0.0-20200427203606-3cfed13b9966/go.mod h1
 github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802 h1:uruHq4dN7GR16kFc5fp3d1RIYzJW5onx8Ybykw2YQFA=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce/go.mod h1:o8v6yHRoik09Xen7gje4m9ERNah1d1PPsVq1VEx9vE4=
-github.com/transparency-dev/merkle v0.0.0-20220427153749-09877c5f5967 h1:0HykT2IlbcP8a0VlH5XsX+a2OCtB+MUVth/SjAK3E2w=
-github.com/transparency-dev/merkle v0.0.0-20220427153749-09877c5f5967/go.mod h1:B8FIw5LTq6DaULoHsVFRzYIUDkl8yuSwCdZnOZGKL/A=
+github.com/transparency-dev/merkle v0.0.1 h1:T9/9gYB8uZl7VOJIhdwjALeRWlxUxSfDEysjfmx+L9E=
+github.com/transparency-dev/merkle v0.0.1/go.mod h1:B8FIw5LTq6DaULoHsVFRzYIUDkl8yuSwCdZnOZGKL/A=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/ulikunitz/xz v0.5.6/go.mod h1:2bypXElzHzzJZwzH67Y6wb67pO62Rzfn7BSiF4ABRW8=