Update go-ipfs version to fix tls panics on go >= 1.15 (#9)

go.mod

@@ -4,19 +4,16 @@ go 1.13
 
 require (
 	github.com/ethereum/go-ethereum v1.9.15
-	github.com/hashicorp/golang-lru v0.5.4
-	github.com/ipfs/go-block-format v0.0.2
 	github.com/ipfs/go-blockservice v0.1.3
-	github.com/ipfs/go-cid v0.0.5
+	github.com/ipfs/go-cid v0.0.7
 	github.com/ipfs/go-filestore v1.0.0 //indirect
-	github.com/ipfs/go-ipfs v0.5.1
+	github.com/ipfs/go-ipfs v0.7.0
 	github.com/ipfs/go-ipfs-blockstore v1.0.0
 	github.com/ipfs/go-ipfs-ds-help v1.0.0
-	github.com/ipfs/go-ipfs-exchange-interface v0.0.1
 	github.com/jmoiron/sqlx v1.2.0
 	github.com/lib/pq v1.5.2
-	github.com/multiformats/go-multihash v0.0.13
-	github.com/onsi/ginkgo v1.12.1
+	github.com/multiformats/go-multihash v0.0.14
+	github.com/onsi/ginkgo v1.14.0
 	github.com/onsi/gomega v1.10.1
 	github.com/sirupsen/logrus v1.6.0
 	github.com/spf13/cobra v1.0.0