build(deps): bump github.com/dgraph-io/ristretto from 0.0.2 to 0.0.3

Bumps [github.com/dgraph-io/ristretto](https://github.com/dgraph-io/ristretto) from 0.0.2 to 0.0.3.
- [Release notes](https://github.com/dgraph-io/ristretto/releases)
- [Changelog](https://github.com/dgraph-io/ristretto/blob/master/CHANGELOG.md)
- [Commits](dgraph-io/ristretto@v0.0.2...v0.0.3)

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

go.mod

@@ -5,7 +5,7 @@ go 1.14
 require (
 	github.com/allegro/bigcache v1.2.1
 	github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b
-	github.com/dgraph-io/ristretto v0.0.2
+	github.com/dgraph-io/ristretto v0.0.3
 	github.com/go-redis/redis/v7 v7.4.0
 	github.com/golang/mock v1.4.3
 	github.com/prometheus/client_golang v1.7.1

go.sum

@@ -24,6 +24,8 @@ github.com/dgraph-io/ristretto v0.0.0-20191010170704-2ba187ef9534 h1:9G6fVccQriM
 github.com/dgraph-io/ristretto v0.0.0-20191010170704-2ba187ef9534/go.mod h1:edzKIzGvqUCMzhTVWbiTSe75zD9Xxq0GtSBtFmaUTZs=
 github.com/dgraph-io/ristretto v0.0.2 h1:a5WaUrDa0qm0YrAAS1tUykT5El3kt62KNZZeMxQn3po=
 github.com/dgraph-io/ristretto v0.0.2/go.mod h1:KPxhHT9ZxKefz+PCeOGsrHpl1qZ7i70dGTu2u+Ahh6E=
+github.com/dgraph-io/ristretto v0.0.3 h1:jh22xisGBjrEVnRZ1DVTpBVQm0Xndu8sMl0CWDzSIBI=
+github.com/dgraph-io/ristretto v0.0.3/go.mod h1:KPxhHT9ZxKefz+PCeOGsrHpl1qZ7i70dGTu2u+Ahh6E=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
 github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=