Bump SDK commit to the latest master (#239)

* Bump go.{mod,sum}

* Update client package imports

* Update app

* Fix tests

* format

* Fix CLI test

cli_test/cli_test.go

@@ -20,7 +20,7 @@ import (
 
 	"github.com/cosmos/gaia/app"
 
-	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/tests"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
@@ -872,7 +872,7 @@ func TestGaiaCLISendGenerateSignAndBroadcast(t *testing.T) {
 	require.True(t, success)
 	require.Empty(t, stderr)
 	msg := unmarshalStdTx(t, stdout)
-	require.Equal(t, msg.Fee.Gas, uint64(client.DefaultGasLimit))
+	require.Equal(t, msg.Fee.Gas, uint64(flags.DefaultGasLimit))
 	require.Equal(t, len(msg.Msgs), 1)
 	require.Equal(t, 0, len(msg.GetSignatures()))