tendermint security update (#7555)

Update tendermint to 0.33.8, see [1] for more information.

[1] golang/go#40618

Author: Alessio Treglia

go.mod

@@ -28,7 +28,7 @@ require (
 	github.com/tendermint/crypto v0.0.0-20191022145703-50d29ede1e15
 	github.com/tendermint/go-amino v0.15.1
 	github.com/tendermint/iavl v0.14.0
-	github.com/tendermint/tendermint v0.33.7
+	github.com/tendermint/tendermint v0.33.8
 	github.com/tendermint/tm-db v0.5.1
 	google.golang.org/grpc v1.30.0 // indirect
 	gopkg.in/yaml.v2 v2.3.0

go.sum

@@ -427,8 +427,8 @@ github.com/tendermint/go-amino v0.15.1/go.mod h1:TQU0M1i/ImAo+tYpZi73AU3V/dKeCoM
 github.com/tendermint/iavl v0.14.0 h1:Jkff+IFrXxRWtH9Jn/ga/2cxNnzMTv58xEKgCJsKUBg=
 github.com/tendermint/iavl v0.14.0/go.mod h1:QmfViflFiXzxKLQE4tAUuWQHq+RSuQFxablW5oJZ6sE=
 github.com/tendermint/tendermint v0.33.5/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
-github.com/tendermint/tendermint v0.33.7 h1:b5CQD8ggDtl4u0EbXzabi0MaOw9NrcXker6ijEkAE74=
-github.com/tendermint/tendermint v0.33.7/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
+github.com/tendermint/tendermint v0.33.8 h1:Xxu4QhpqcomSE0iQDw1MqLgfsa8fqtPtWFJK6zZOVso=
+github.com/tendermint/tendermint v0.33.8/go.mod h1:0yUs9eIuuDq07nQql9BmI30FtYGcEC60Tu5JzB5IezM=
 github.com/tendermint/tm-db v0.5.1 h1:H9HDq8UEA7Eeg13kdYckkgwwkQLBnJGgX4PgLJRhieY=
 github.com/tendermint/tm-db v0.5.1/go.mod h1:g92zWjHpCYlEvQXvy9M168Su8V1IBEeawpXVVBaK4f4=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=