Upgrade jsoncpp to 1.9.4

Bug: 170642246
Change-Id: Id1fae5a1b6421117f923c616718ee4b3571231e0
diff --git a/METADATA b/METADATA
index d97975c..b35e0c7 100644
--- a/METADATA
+++ b/METADATA
@@ -1,3 +1,15 @@
+name: "jsoncpp"
+description: "JsonCpp is a C++ library that allows manipulating JSON values, including serialization and deserialization to and from strings."
 third_party {
+  url {
+    type: ARCHIVE
+    value: "https://github.com/open-source-parsers/jsoncpp/archive/1.9.4.tar.gz"
+  }
+  version: "1.9.4"
   license_type: NOTICE
+  last_upgrade_date {
+    year: 2021
+    month: 2
+    day: 24
+  }
 }