Changed Kotlinx coroutines core library dependency scope

From 'api' to 'implementation'

Author: agcom

README.md

@@ -34,11 +34,10 @@ For Maven and Ivy snippets, see the [distribution page](https://bintray.com/agco
 
   ```kotlin
   import io.github.agcom.knio2.*
-  import kotlinx.coroutines.runBlocking
   import java.nio.ByteBuffer
   import java.nio.channels.AsynchronousSocketChannel
 
-  fun main() = runBlocking<Unit> {
+  suspend fun main() {
       val socket: AsynchronousSocketChannel = TODO().apply {
           connectAwait(TODO()) // connectAwait
       }

examples/src/main/kotlin/io/github/agcom/knio2/examples/PseudoUsage.kt

@@ -2,14 +2,11 @@
 
 package io.github.agcom.knio2.examples
 
-import io.github.agcom.knio2.connectAwait
-import io.github.agcom.knio2.readAwait
-import io.github.agcom.knio2.writeAwait
-import kotlinx.coroutines.runBlocking
+import io.github.agcom.knio2.*
 import java.nio.ByteBuffer
 import java.nio.channels.AsynchronousSocketChannel
 
-fun main() = runBlocking<Unit> {
+suspend fun main() {
     val socket: AsynchronousSocketChannel = TODO().apply {
         connectAwait(TODO()) // connectAwait
     }

lib/build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 dependencies {
-    api "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlinxCoroutinesVersion"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlinxCoroutinesVersion"
 }
 
 kotlin {