build(deps): bump github.com/tendermint/tm-db from 0.6.3 to 0.6.4 (#8555)

Bumps [github.com/tendermint/tm-db](https://github.com/tendermint/tm-db) from 0.6.3 to 0.6.4.
- [Release notes](https://github.com/tendermint/tm-db/releases)
- [Changelog](https://github.com/tendermint/tm-db/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tendermint/tm-db/compare/v0.6.3...v0.6.4)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -48,7 +48,7 @@ require (
 	github.com/tendermint/crypto v0.0.0-20191022145703-50d29ede1e15
 	github.com/tendermint/go-amino v0.16.0
 	github.com/tendermint/tendermint v0.34.3
-	github.com/tendermint/tm-db v0.6.3
+	github.com/tendermint/tm-db v0.6.4
 	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
 	google.golang.org/genproto v0.0.0-20210114201628-6edceaf6022f
 	google.golang.org/grpc v1.35.0

go.sum

@@ -678,6 +678,8 @@ github.com/tendermint/tendermint v0.34.3/go.mod h1:h57vnXeOlrdvvNFCqPBSaOrpOivl+
 github.com/tendermint/tm-db v0.6.2/go.mod h1:GYtQ67SUvATOcoY8/+x6ylk8Qo02BQyLrAs+yAcLvGI=
 github.com/tendermint/tm-db v0.6.3 h1:ZkhQcKnB8/2jr5EaZwGndN4owkPsGezW2fSisS9zGbg=
 github.com/tendermint/tm-db v0.6.3/go.mod h1:lfA1dL9/Y/Y8wwyPp2NMLyn5P5Ptr/gvDFNWtrCWSf8=
+github.com/tendermint/tm-db v0.6.4 h1:3N2jlnYQkXNQclQwd/eKV/NzlqPlfK21cpRRIx80XXQ=
+github.com/tendermint/tm-db v0.6.4/go.mod h1:dptYhIpJ2M5kUuenLr+Yyf3zQOv1SgBZcl8/BmWlMBw=
 github.com/tidwall/gjson v1.6.1/go.mod h1:BaHyNc5bjzYkPqgLq7mdVzeiRtULKULXLgZFKsxEHI0=
 github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
 github.com/tidwall/pretty v1.0.2/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=