* kotlinx.atomicfu compiler plugin for JS_IR
Support transformations of atomic operations introduced by the kotlinx.atomicfu library for the JS_IR backend. Compiler plugin is applied externally by the kotlinx.atomicfu gradle plugin.
* Apply compiler plugin for JS platform only
* New plugin test structure
* testGroupOutputDirPrefix changed
Build parameters (with corresponding project properties):
- build.number (buildNumber) - build number from build server, goes into manifest, by default snapshot
- deployVersion (kotlinVersion, project.version) - version of artifacts, by default build.number
- bootstrap.kotlin.version (bootstrapKotlinVersion) - version of bootstrap compiler