update gogo to 1.1.1 and other misc. updates

Refs #1883

Gopkg.lock

@@ -411,6 +411,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "61a73afdde899a26c5da19eebd59260cd4b95d50b99c01e0c755ffc82d6d89f0"
+  inputs-digest = "9beb2d27dc19e3f9e2c7f416f312f7129f5441b1b53def42503fc6f7d3a54b16"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -31,11 +31,11 @@
 
 [[constraint]]
   name = "github.com/go-kit/kit"
-  version = "=0.6.0"
+  version = "=0.7.0"
 
 [[constraint]]
   name = "github.com/gogo/protobuf"
-  version = "=1.1.0"
+  version = "=1.1.1"
 
 [[constraint]]
   name = "github.com/golang/protobuf"
@@ -51,15 +51,15 @@
 
 [[constraint]]
   name = "github.com/spf13/cobra"
-  version = "=0.0.1"
+  version = "=0.0.3"
 
 [[constraint]]
   name = "github.com/spf13/viper"
-  version = "=1.0.0"
+  version = "=1.0.2"
 
 [[constraint]]
   name = "github.com/stretchr/testify"
-  version = "=1.2.1"
+  version = "=1.2.2"
 
 [[constraint]]
   name = "github.com/tendermint/go-amino"