Add JSONoid to implementations

implementations.md

@@ -169,6 +169,7 @@ For example, the only incompatibilities between draft-04 and draft-06 involve `e
     -   [saasquatch/json-schema-inferrer](https://github.com/saasquatch/json-schema-inferrer) _draft-07, -06, -04_ (Apache 2.0) - Java library for inferring JSON Schemas from one or multiple JSON samples.
 -   Scala
     -   [Schema Guru](https://github.com/snowplow/schema-guru) (Apache 2.0) - CLI util, Spark Job and Web UI for deriving JSON Schemas out of corpus of JSON instances; see issue [178](https://github.com/snowplow/schema-guru/issues/178) for progress towards draft-06+ support
+    -   [JSONoid](https://github.com/michaelmior/jsonoid-discovery/) (MIT) - command line tool and Spark application for inferring schemas from JSON documents, supports draft 2019-09
 -   Clojure
     -   [luposlip/json-schema](https://github.com/luposlip/json-schema) (Apache 2.0) - infer JSON Schema from Clojure data
 -   Online (web tool)