build(deps): bump github.com/ipfs/go-merkledag from 0.3.2 to 0.4.1

Bumps [github.com/ipfs/go-merkledag](https://github.com/ipfs/go-merkledag) from 0.3.2 to 0.4.1.
- [Release notes](https://github.com/ipfs/go-merkledag/releases)
- [Commits](ipfs/go-merkledag@v0.3.2...v0.4.1)

---
updated-dependencies:
- dependency-name: github.com/ipfs/go-merkledag
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

go.mod

@@ -3,14 +3,14 @@ module github.com/jsign/go-unixfs-proof
 go 1.17
 
 require (
-	github.com/ipfs/go-blockservice v0.1.2
+	github.com/ipfs/go-blockservice v0.1.7
 	github.com/ipfs/go-cid v0.0.8-0.20210716091050-de6c03deae1c
-	github.com/ipfs/go-datastore v0.4.2
+	github.com/ipfs/go-datastore v0.4.5
 	github.com/ipfs/go-ipfs-blockstore v1.0.4
 	github.com/ipfs/go-ipfs-chunker v0.0.5
 	github.com/ipfs/go-ipfs-exchange-offline v0.0.1
 	github.com/ipfs/go-ipld-format v0.2.0
-	github.com/ipfs/go-merkledag v0.3.2
+	github.com/ipfs/go-merkledag v0.4.1
 	github.com/ipfs/go-unixfs v0.2.6
 	github.com/ipld/go-car v0.3.2
 	github.com/stretchr/testify v1.7.0
@@ -29,6 +29,7 @@ require (
 	github.com/ipfs/go-ipfs-posinfo v0.0.1 // indirect
 	github.com/ipfs/go-ipfs-util v0.0.2 // indirect
 	github.com/ipfs/go-ipld-cbor v0.0.5 // indirect
+	github.com/ipfs/go-ipld-legacy v0.1.0 // indirect
 	github.com/ipfs/go-log v1.0.5 // indirect
 	github.com/ipfs/go-log/v2 v2.1.3 // indirect
 	github.com/ipfs/go-metrics-interface v0.0.1 // indirect