Fix the build

In between the json patch being written, and the json patch being
merged, nlohmann library added binary types:
https://nlohmann.github.io/json/features/binary_values/

Which is non standard, but used for things like cbor.

Add a switch to handle them.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: I8599847a063a14c5f489e8347c2c440347d2544d
diff --git a/include/json_html_serializer.hpp b/include/json_html_serializer.hpp
index a7d5297..174b086 100644
--- a/include/json_html_serializer.hpp
+++ b/include/json_html_serializer.hpp
@@ -588,6 +588,11 @@
             out += "null";
             return;
         }
+        case nlohmann::json::value_t::binary:
+        {
+            // Do nothing;  Should never happen.
+            return;
+        }
     }
 }