Upgrading server dependancies (#6215)

vendor/github.com/spf13/cast/cast.go

@@ -151,3 +151,9 @@ func ToIntSlice(i interface{}) []int {
 	v, _ := ToIntSliceE(i)
 	return v
 }
+
+// ToDurationSlice casts an interface to a []time.Duration type.
+func ToDurationSlice(i interface{}) []time.Duration {
+	v, _ := ToDurationSliceE(i)
+	return v
+}