libs: Remove db from tendermint in favor of tendermint/tm-cmn (#3811)

* Remove db from tendemrint in favor of tendermint/tm-cmn

- remove db from `libs`
- update dependancy, there have been no breaking changes in the updated deps
	- https://github.com/grpc/grpc-go/releases
	- https://github.com/golang/protobuf/releases

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* changelog add

* gofmt

* more gofmt

state/txindex/indexer_service_test.go

@@ -8,11 +8,11 @@ import (
 	"github.com/stretchr/testify/require"
 
 	abci "github.com/tendermint/tendermint/abci/types"
-	"github.com/tendermint/tendermint/libs/db"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/state/txindex"
 	"github.com/tendermint/tendermint/state/txindex/kv"
 	"github.com/tendermint/tendermint/types"
+	"github.com/tendermint/tm-cmn/db"
 )
 
 func TestIndexerServiceIndexesBlocks(t *testing.T) {

state/txindex/kv/kv.go

@@ -12,10 +12,10 @@ import (
 	"github.com/pkg/errors"
 
 	cmn "github.com/tendermint/tendermint/libs/common"
-	dbm "github.com/tendermint/tendermint/libs/db"
 	"github.com/tendermint/tendermint/libs/pubsub/query"
 	"github.com/tendermint/tendermint/state/txindex"
 	"github.com/tendermint/tendermint/types"
+	dbm "github.com/tendermint/tm-cmn/db"
 )
 
 const (

state/txindex/kv/kv_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/stretchr/testify/require"
 	abci "github.com/tendermint/tendermint/abci/types"
 	cmn "github.com/tendermint/tendermint/libs/common"
-	db "github.com/tendermint/tendermint/libs/db"
+	db "github.com/tendermint/tm-cmn/db"
 
 	"github.com/tendermint/tendermint/libs/pubsub/query"
 	"github.com/tendermint/tendermint/state/txindex"