Add badges for newly supported drafts

Author: OptimumCode

README.md

@@ -388,6 +388,8 @@ This library is also integrated into [bowtie](https://github.com/bowtie-json-sch
 and runs against the official test suite along with other libraries.
 You can find the report [here](https://bowtie.report/).
 
+[![draft-04](https://img.shields.io/endpoint?url=https://bowtie-json-schema.github.io/bowtie/badges/kotlin-kmp-json-schema-validator/compliance/draft4.json)](https://bowtie.report/#/dialects/draft4?language=kotlin)
+[![draft-06](https://img.shields.io/endpoint?url=https://bowtie-json-schema.github.io/bowtie/badges/kotlin-kmp-json-schema-validator/compliance/draft6.json)](https://bowtie.report/#/dialects/draft6?language=kotlin)
 [![draft-07](https://img.shields.io/endpoint?url=https://bowtie-json-schema.github.io/bowtie/badges/kotlin-kmp-json-schema-validator/compliance/draft7.json)](https://bowtie.report/#/dialects/draft7?language=kotlin)
 [![draft/2019-09](https://img.shields.io/endpoint?url=https://bowtie-json-schema.github.io/bowtie/badges/kotlin-kmp-json-schema-validator/compliance/draft2019-09.json)](https://bowtie.report/#/dialects/draft2019-09?language=kotlin)
 [![draft/2020-12](https://img.shields.io/endpoint?url=https://bowtie-json-schema.github.io/bowtie/badges/kotlin-kmp-json-schema-validator/compliance/draft2020-12.json)](https://bowtie.report/#/dialects/draft2020-12?language=kotlin)