Old kotlin to js lib in a new kotlin 1.4 project

JavaScript
1

I have made a kotlin lib in 1.3 than I compiled into a lib-js.jar and publish it in a maven repo
I could use it fine in my other kotlin 1.3 project, but in my new kotlin 1.4 project, it’s not working. During the js compilation the classe contained in my js lib are not found

Is there a specific way to do the import?

my code, of my 1.4 build.gradle project:

sourceSets {
    val commonMain by getting {
        kotlin.srcDir("src/main/kotlin")
        resources.srcDir("src/main/resource")
        dependencies {

            implementation("org.jeasy:lib:1.0" )
        }
    }
    val commonTest by getting {
        ...
    }
    val jvmMain by getting {
        dependencies {

            implementation("org.jeasy:lib-jvm:1.0" )
        }
    }
    val jvmTest by getting {
     ...
    }
    val jsMain by getting {
        dependencies {
            implementation("org.jeasy:lib-js:1.0" )
        }
    }

the lib-js.jar contains:
package.json (<- I generate this file myself)
lib/
lib.js
lib.js.map
lib.meta.js
META-INF/