vendor: update all dependencies

* Update all dependencies
  * Remove all `[[constraint]]` from Gopkg.toml
  * Add in the minimum number of `[[override]]` to build
  * Remove go get of github.com/inconshreveable/mousetrap as it is vendored
  * Update docs with new policy on constraints

vendor/github.com/aws/aws-sdk-go/private/protocol/xml/xmlutil/unmarshal.go

@@ -52,9 +52,15 @@ func parse(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
 	if t == "" {
 		switch rtype.Kind() {
 		case reflect.Struct:
-			t = "structure"
+			// also it can't be a time object
+			if _, ok := r.Interface().(*time.Time); !ok {
+				t = "structure"
+			}
 		case reflect.Slice:
-			t = "list"
+			// also it can't be a byte slice
+			if _, ok := r.Interface().([]byte); !ok {
+				t = "list"
+			}
 		case reflect.Map:
 			t = "map"
 		}