build(deps): bump github.com/spf13/viper from 1.1.0 to 1.2.0

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](https://github.com/spf13/viper/compare/v1.1.0...v1.2.0)

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

Gopkg.lock

@@ -337,12 +337,12 @@
   version = "v1.0.2"
 
 [[projects]]
-  digest = "1:4fc8a61287ccfb4286e1ca5ad2ce3b0b301d746053bf44ac38cf34e40ae10372"
+  digest = "1:6e30a27eac59a148b3f7a32e0ba54706b31dcde5a42f63b22cb47873b62fa343"
   name = "github.com/spf13/viper"
   packages = ["."]
   pruneopts = "UT"
-  revision = "907c19d40d9a6c9bb55f040ff4ae45271a4754b9"
-  version = "v1.1.0"
+  revision = "8fb642006536c8d3760c99d4fa2389f5e2205631"
+  version = "v1.2.0"
 
 [[projects]]
   digest = "1:03aa6e485e528acb119fb32901cf99582c380225fc7d5a02758e08b180cb56c3"

Gopkg.toml

@@ -95,7 +95,7 @@
 
 [[constraint]]
   name = "github.com/spf13/viper"
-  version = "1.0.2"
+  version = "1.2.0"
 
 [[constraint]]
   branch = "v1"