Report json as unmaintained (#1536)

* Report json as unmaintained

* Minor date alignment

* Adjust crates links

Co-authored-by: pinkforest <36498018+pinkforest@users.noreply.github.com>

crates/json/RUSTSEC-0000-0000.md

@@ -0,0 +1,28 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "json"
+date = "2022-02-01"
+url = "https://github.com/maciejhirsz/json-rust/issues/205"
+references = ["https://github.com/maciejhirsz/json-rust/issues/196"]
+informational = "unmaintained"
+
+[versions]
+patched = []
+```
+
+# json is unmaintained
+
+Last release was almost 3 years ago.
+
+The maintainer is unresponsive with outstanding issues.
+
+One of the outstanding issues include [a possible soundness issue](https://github.com/maciejhirsz/json-rust/issues/196).
+
+## Possible Alternative(s)
+
+The below list has not been vetted in any way and may or may not contain alternatives;
+
+- [serde_json](https://crates.io/crates/serde_json)
+- [json-deserializer](https://crates.io/crates/json-deserializer)
+- [simd-json](https://crates.io/crates/simd-json)