Upgrade to Kotlin Coroutines 1.3.5 (and Checkstyle 8.30)

build.gradle

@@ -32,7 +32,7 @@ configure(allprojects) { project ->
 			mavenBom "io.rsocket:rsocket-bom:1.0.0-RC6"
 			mavenBom "org.eclipse.jetty:jetty-bom:9.4.27.v20200227"
 			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.3.70"
-			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.3.2"
+			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.3.5"
 			mavenBom "org.junit:junit-bom:5.6.0"
 		}
 		dependencies {
@@ -326,7 +326,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "8.29"
+		toolVersion = "8.30"
 		configDir = rootProject.file("src/checkstyle")
 	}