feat: switch to HAMT based on size (#91)

Author: schomatis

Diff for: go.mod

@@ -2,17 +2,18 @@ module github.com/ipfs/go-unixfs
 
 require (
 	github.com/Stebalien/go-bitfield v0.0.1
-	github.com/gogo/protobuf v1.2.1
+	github.com/gogo/protobuf v1.3.2
 	github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c // indirect
 	github.com/ipfs/go-bitswap v0.1.2 // indirect
-	github.com/ipfs/go-cid v0.0.2
+	github.com/ipfs/go-cid v0.0.7
 	github.com/ipfs/go-ipfs-chunker v0.0.1
 	github.com/ipfs/go-ipfs-files v0.0.3
 	github.com/ipfs/go-ipfs-posinfo v0.0.1
 	github.com/ipfs/go-ipfs-util v0.0.1
 	github.com/ipfs/go-ipld-format v0.0.2
+	github.com/ipfs/go-log v1.0.5
 	github.com/ipfs/go-merkledag v0.2.3
-	github.com/multiformats/go-multihash v0.0.5
+	github.com/multiformats/go-multihash v0.0.13
 	github.com/polydawn/refmt v0.0.0-20190408063855-01bf1e26dd14 // indirect
 	github.com/smartystreets/assertions v1.0.0 // indirect
 	github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a // indirect