Bump github.com/spf13/viper from 1.9.0 to 1.10.0

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.9.0 to 1.10.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](spf13/viper@v1.9.0...v1.10.0)

---
updated-dependencies:
- dependency-name: github.com/spf13/viper
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

go.mod

@@ -6,16 +6,14 @@ require (
 	github.com/auth0/go-jwt-middleware v1.0.1
 	github.com/clbanning/mxj v1.8.4
 	github.com/form3tech-oss/jwt-go v3.2.5+incompatible
-	github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
 	github.com/gorilla/mux v1.8.0
 	github.com/gosidekick/migration/v3 v3.0.0
 	github.com/jmoiron/sqlx v1.3.4
 	github.com/lib/pq v1.10.4
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/nuveo/log v0.0.0-20190430190217-44d02db6bdf8
-	github.com/smartystreets/assertions v1.1.0 // indirect
 	github.com/spf13/cobra v1.2.1
-	github.com/spf13/viper v1.9.0
+	github.com/spf13/viper v1.10.0
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/negroni v1.0.0
 )