Upgrade to lotus v1.12.0-rc1 and v6 actors (#147)

* Upgrade Lotus dependencies

* Bump specs-actors version to v6

* Add missing go.sum dependency

* Update filecoin-ffi

* Update node mock for tests

go.mod

@@ -5,24 +5,25 @@ go 1.16
 require (
 	github.com/coinbase/rosetta-sdk-go v0.6.10
 	github.com/filecoin-project/go-address v0.0.5
+	github.com/filecoin-project/go-amt-ipld/v2 v2.1.1-0.20201006184820-924ee87a1349 // indirect
 	github.com/filecoin-project/go-bitfield v0.2.4
-	github.com/filecoin-project/go-data-transfer v1.4.3
-	github.com/filecoin-project/go-fil-markets v1.2.5
+	github.com/filecoin-project/go-data-transfer v1.10.1
+	github.com/filecoin-project/go-fil-markets v1.12.0
 	github.com/filecoin-project/go-jsonrpc v0.1.4-0.20210217175800-45ea43ac2bec
-	github.com/filecoin-project/go-multistore v0.0.3
-	github.com/filecoin-project/go-state-types v0.1.1-0.20210506134452-99b279731c48
-	github.com/filecoin-project/lotus v1.10.0
-	github.com/filecoin-project/specs-actors v0.9.13
-	github.com/filecoin-project/specs-actors/v2 v2.3.5-0.20210114162132-5b58b773f4fb
-	github.com/filecoin-project/specs-actors/v4 v4.0.0
+	github.com/filecoin-project/go-state-types v0.1.1-0.20210915140513-d354ccf10379
+	github.com/filecoin-project/lotus v1.12.0-rc1
+	github.com/filecoin-project/specs-actors v0.9.14
+	github.com/filecoin-project/specs-actors/v2 v2.3.5
+	github.com/filecoin-project/specs-actors/v6 v6.0.0-20211007184712-855f60561dfc
 	github.com/google/uuid v1.2.0
-	github.com/ipfs/go-cid v0.0.7
-	github.com/ipfs/go-log v1.0.4
-	github.com/libp2p/go-libp2p-core v0.8.5
-	github.com/multiformats/go-multihash v0.0.14
+	github.com/ipfs/go-cid v0.1.0
+	github.com/ipfs/go-log v1.0.5
+	github.com/libp2p/go-libp2p-core v0.8.6
+	github.com/multiformats/go-multihash v0.0.15
 	github.com/orcaman/concurrent-map v0.0.0-20190826125027-8c72a8bb44f6
+	github.com/stretchr/objx v0.2.0 // indirect
 	github.com/stretchr/testify v1.7.0
-	github.com/zondax/rosetta-filecoin-lib v1.1000.1
+	github.com/zondax/rosetta-filecoin-lib v1.1200.0
 	gotest.tools v2.2.0+incompatible
 )