build(deps): bump github.com/armon/go-metrics from 0.3.8 to 0.3.9 (#129)

Bumps [github.com/armon/go-metrics](https://github.com/armon/go-metrics) from 0.3.8 to 0.3.9.
- [Release notes](https://github.com/armon/go-metrics/releases)
- [Commits](hashicorp/go-metrics@v0.3.8...v0.3.9)

---
updated-dependencies:
- dependency-name: github.com/armon/go-metrics
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

go.mod

@@ -3,7 +3,7 @@ module github.com/cosmos/ethermint
 go 1.15
 
 require (
-	github.com/armon/go-metrics v0.3.8
+	github.com/armon/go-metrics v0.3.9
 	github.com/aws/aws-sdk-go v1.38.21 // indirect
 	github.com/bitly/go-simplejson v0.5.0 // indirect
 	github.com/btcsuite/btcd v0.22.0-beta
@@ -30,7 +30,7 @@ require (
 	github.com/kr/pretty v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/miguelmota/go-ethereum-hdwallet v0.0.0-20200123000308-a60dcd172b4c
-	github.com/palantir/stacktrace v0.0.0-20161112013806-78658fd2d177 // indirect
+	github.com/palantir/stacktrace v0.0.0-20161112013806-78658fd2d177
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/tsdb v0.10.0 // indirect
 	github.com/rakyll/statik v0.1.7

go.sum

@@ -81,8 +81,9 @@ github.com/aristanetworks/splunk-hec-go v0.3.3/go.mod h1:1VHO9r17b0K7WmOlLb9nTk/
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
-github.com/armon/go-metrics v0.3.8 h1:oOxq3KPj0WhCuy50EhzwiyMyG2ovRQZpZLXQuOh2a/M=
 github.com/armon/go-metrics v0.3.8/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
+github.com/armon/go-metrics v0.3.9 h1:O2sNqxBdvq8Eq5xmzljcYzAORli6RWCvEym4cJf9m18=
+github.com/armon/go-metrics v0.3.9/go.mod h1:4O98XIr/9W0sxpJ8UaYkvjk10Iff7SnFrb4QAOwNTFc=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=