Bump snapshot version to 3.0.0

Author: Kantis

buildSrc/src/main/kotlin/Ci.kt

@@ -2,7 +2,7 @@ object Ci {
 
  // this is the version used for building snapshots
  // .GITHUB_RUN_NUMBER-snapshot will be appended
- private const val snapshotBase = "2.0.0"
+ private const val snapshotBase = "3.0.0"
 
  private val githubRunNumber = System.getenv("GITHUB_RUN_NUMBER")