Introduce event dispatcher and fix heartbeat, auth reply events

bl-codec/build.gradle.kts

@@ -16,9 +16,7 @@ kotlin {
 
     sourceSets {
         commonMain.dependencies {
-            api("org.jetbrains.kotlinx:kotlinx-serialization-json:1.11.0")
-            api("org.kotlincrypto.hash:md:0.8.0")
-            api("org.jetbrains.kotlinx:kotlinx-io-core:0.9.1")
+            implementation("org.jetbrains.kotlinx:kotlinx-io-core:0.9.1")
         }
 
         commonTest.dependencies {