Upgrade to Kotlin Coroutines 1.3.2.

Original pull request: gh-479.

pom.xml

@@ -24,7 +24,7 @@
 		<json-path.version>2.4.0</json-path.version>
 		<junit.version>5.5.0</junit.version>
 		<kotlin.version>1.3.50</kotlin.version>
-		<kotlin-coroutines.version>1.3.1</kotlin-coroutines.version>
+		<kotlin-coroutines.version>1.3.2</kotlin-coroutines.version>
 		<mockk.version>1.9.3</mockk.version>
 		<mockito-core.version>3.0.0</mockito-core.version>
 		<spring.version>5.2.0.RC2</spring.version>

spring-vault-core/src/main/kotlin/org/springframework/vault/core/ReactiveVaultOperationsExtensions.kt

@@ -15,7 +15,6 @@
  */
 package org.springframework.vault.core
 
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.reactive.asFlow
 import kotlinx.coroutines.reactive.awaitFirstOrNull
@@ -58,7 +57,6 @@ suspend inline fun <reified T : Any> ReactiveVaultOperations.awaitReadOrNull(pat
  * @author Mark Paluch
  * @since 2.2
  */
-@ExperimentalCoroutinesApi
 fun ReactiveVaultOperations.listAsFlow(path: String): Flow<String> =
         list(path).asFlow()
 

spring-vault-core/src/test/kotlin/org/springframework/vault/core/ReactiveVaultOperationsExtensionsTests.kt

@@ -18,7 +18,6 @@ package org.springframework.vault.core
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.verify
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.toList
 import kotlinx.coroutines.runBlocking
 import org.assertj.core.api.Assertions.assertThat
@@ -80,7 +79,6 @@ class ReactiveVaultOperationsExtensionsTests {
         }
     }
 
-    @ExperimentalCoroutinesApi
     @Test
     fun listAsFlow() {