build(deps): bump github.com/spf13/viper from 1.2.0 to 1.2.1

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](https://github.com/spf13/viper/compare/v1.2.0...v1.2.1)

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

Gopkg.lock

@@ -337,12 +337,12 @@
   version = "v1.0.2"
 
 [[projects]]
-  digest = "1:6e30a27eac59a148b3f7a32e0ba54706b31dcde5a42f63b22cb47873b62fa343"
+  digest = "1:214775c11fd26da94a100111a62daa25339198a4f9c57cb4aab352da889f5b93"
   name = "github.com/spf13/viper"
   packages = ["."]
   pruneopts = "UT"
-  revision = "8fb642006536c8d3760c99d4fa2389f5e2205631"
-  version = "v1.2.0"
+  revision = "2c12c60302a5a0e62ee102ca9bc996277c2f64f5"
+  version = "v1.2.1"
 
 [[projects]]
   digest = "1:03aa6e485e528acb119fb32901cf99582c380225fc7d5a02758e08b180cb56c3"

Gopkg.toml

@@ -95,7 +95,7 @@
 
 [[constraint]]
   name = "github.com/spf13/viper"
-  version = "1.2.0"
+  version = "1.2.1"
 
 [[constraint]]
   branch = "v1"