build fail - jcenter bintray down

[sreich]

com.jaredsburrows:gradle-license-plugin:0.8.90 depends on

// https://mvnrepository.com/artifact/org.jetbrains.kotlinx/kotlinx-html-js implementation 'org.jetbrains.kotlinx:kotlinx-html-js:0.7.2'

this gives a 404

i am making a pull request for this.