Update to Kotlin 1.6.0 (#2518)

Author: Christian Melchior

snooty.toml

@@ -59,8 +59,8 @@ atlas = "Atlas"
 admin-api-page = "/admin/api/v3/#"
 base-url = "https://www.mongodb.com/docs/realm"
 cpp-prefix = "https://www.mongodb.com/docs/realm-sdks/cpp/latest"
-kotlin-sdk-version = "1.5.0"
-kotlinx-coroutines-version = "1.6.0-native-mt"
+kotlin-sdk-version = "1.6.0"
+kotlinx-coroutines-version = "1.6.4"
 kotlin-sync-prefix = "https://www.mongodb.com/docs/realm-sdks/kotlin/latest/library-sync/-realm%20-kotlin%20-s-d-k%20-%20-sync/"
 kotlin-local-prefix = "https://www.mongodb.com/docs/realm-sdks/kotlin/latest/library-base/-realm%20-kotlin%20-s-d-k/"
 java-sdk-version = "10.11.1"