Just for linters, and added draft support

Author: Relequestual

implementations.md

@@ -275,7 +275,7 @@ Schema Repositories
 -   [SchemaStore.org](http://schemastore.org/json/) - validate against common JSON Schemas
 
 
-Schema Linter/Parser
---------------------
+Schema Linter
+-------------
 
--   [json-schema-linter](https://www.json-schema-linter.com/) - Lint/validate/parse json-schema itself and find out out typo, missing properties, missing required keys etc
+-   [json-schema-linter](https://www.json-schema-linter.com/) - Lint/validate/parse json-schema itself and find out out typo, missing properties, missing required keys etc. Supports draft 4, 6, and 7.