Add dependency management for Kotlin Coroutines

See gh-17701

Author: sdeleuze

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -51,6 +51,7 @@
 		<commons-lang3.version>3.9</commons-lang3.version>
 		<commons-pool.version>1.6</commons-pool.version>
 		<commons-pool2.version>2.7.0</commons-pool2.version>
+		<coroutines.version>1.3.0-RC</coroutines.version>
 		<couchbase-client.version>2.7.7</couchbase-client.version>
 		<couchbase-cache-client.version>2.1.0</couchbase-cache-client.version>
 		<derby.version>10.14.2.0</derby.version>
@@ -2595,6 +2596,13 @@
 				<scope>import</scope>
 				<type>pom</type>
 			</dependency>
+			<dependency>
+				<groupId>org.jetbrains.kotlinx</groupId>
+				<artifactId>kotlinx-coroutines-bom</artifactId>
+				<version>${coroutines.version}</version>
+				<scope>import</scope>
+				<type>pom</type>
+			</dependency>
 			<dependency>
 				<groupId>org.jolokia</groupId>
 				<artifactId>jolokia-core</artifactId>