Bump github.com/mitchellh/mapstructure in /packages/arb-util

Bumps [github.com/mitchellh/mapstructure](https://github.com/mitchellh/mapstructure) from 1.4.3 to 1.5.0.
- [Release notes](https://github.com/mitchellh/mapstructure/releases)
- [Changelog](https://github.com/mitchellh/mapstructure/blob/master/CHANGELOG.md)
- [Commits](mitchellh/mapstructure@v1.4.3...v1.5.0)

---
updated-dependencies:
- dependency-name: github.com/mitchellh/mapstructure
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

packages/arb-util/go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/golang-jwt/jwt v3.2.2+incompatible
 	github.com/knadh/koanf v1.4.0
 	github.com/mailru/easygo v0.0.0-20190618140210-3c14a0dc985f
-	github.com/mitchellh/mapstructure v1.4.3
+	github.com/mitchellh/mapstructure v1.5.0
 	github.com/offchainlabs/arbitrum/packages/arb-node-core v0.8.0
 	github.com/offchainlabs/go-solidity-sha3 v0.1.2
 	github.com/pkg/errors v0.9.1

packages/arb-util/go.sum

@@ -432,8 +432,8 @@ github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0Qu
 github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
-github.com/mitchellh/mapstructure v1.4.3 h1:OVowDSCllw/YjdLkam3/sm7wEtOy59d8ndGgCcyj8cs=
-github.com/mitchellh/mapstructure v1.4.3/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
+github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mitchellh/pointerstructure v1.2.0 h1:O+i9nHnXS3l/9Wu7r4NrEdwA2VFTicjUEN1uBnDo34A=
 github.com/mitchellh/pointerstructure v1.2.0/go.mod h1:BRAsLI5zgXmw97Lf6s25bs8ohIXc3tViBH44KcwB2g4=
 github.com/mitchellh/reflectwalk v1.0.0/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=