updated kotlin coroutines to 1.2.1

Author: FVershinin

pom.xml

@@ -15,7 +15,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <kotlin.version>1.3.10</kotlin.version>
-        <kotlin-coroutines.version>1.0.1</kotlin-coroutines.version>
+        <kotlin-coroutines.version>1.2.1</kotlin-coroutines.version>
         <jackson.version>2.9.8</jackson.version>
 
         <maven.compiler.source>${java.version}</maven.compiler.source>