Bump kotlin-stdlib from 1.3.50 to 1.3.60

Bumps [kotlin-stdlib](https://github.com/JetBrains/kotlin) from 1.3.50 to 1.3.60.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

tracer-okhttp/pom.xml

@@ -28,7 +28,7 @@
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>
-            <version>1.3.50</version>
+            <version>1.3.60</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>