build(deps): bump github.com/ethereum/go-ethereum from 1.9.5 to 1.9.25

Bumps [github.com/ethereum/go-ethereum](https://github.com/ethereum/go-ethereum) from 1.9.5 to 1.9.25.
- [Release notes](https://github.com/ethereum/go-ethereum/releases)
- [Commits](ethereum/go-ethereum@v1.9.5...v1.9.25)

---
updated-dependencies:
- dependency-name: github.com/ethereum/go-ethereum
  dependency-type: direct:production
...

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

Author: dependabot[bot]

go.mod

@@ -3,11 +3,9 @@ module github.com/renproject/hyperdrive
 go 1.13
 
 require (
-	github.com/ethereum/go-ethereum v1.9.5
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.1 // indirect
-	github.com/onsi/ginkgo v1.11.0
-	github.com/onsi/gomega v1.8.1
+	github.com/ethereum/go-ethereum v1.9.25
+	github.com/onsi/ginkgo v1.14.0
+	github.com/onsi/gomega v1.10.1
 	github.com/renproject/abi v0.4.1
 	github.com/renproject/id v0.2.2
 	github.com/renproject/phi v0.1.0