Fixed dependencies in examples from README.md

Fixes #165

Author: fzhinkin

README.md

@@ -38,10 +38,11 @@ repositories {
 }
 ```
 
-Add the library to dependencies:
+Add libraries to dependencies:
 ```kotlin
 dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-io-core:0.2.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-io-bytestring:0.2.0")
 }
 ```
 
@@ -52,6 +53,7 @@ kotlin {
         commonMain {
             dependencies {
                 implementation("org.jetbrains.kotlinx:kotlinx-io-core:0.2.0")
+                implementation("org.jetbrains.kotlinx:kotlinx-io-bytestring:0.2.0")
             }
         }
     }
@@ -60,11 +62,16 @@ kotlin {
 
 ### Maven
 
-Add the library to dependencies:
+Add libraries to dependencies:
 ```xml
 <dependency>
     <groupId>org.jetbrains.kotlinx</groupId>
-    <artifactId>kotlinx-io-core</artifactId>
+    <artifactId>kotlinx-io-core-jvm</artifactId>
+    <version>0.2.0</version>
+</dependency>
+<dependency>
+    <groupId>org.jetbrains.kotlinx</groupId>
+    <artifactId>kotlinx-io-bytestring-jvm</artifactId>
     <version>0.2.0</version>
 </dependency>
 ```