Update Kotlin to 1.3.50
diff --git a/gradle.properties b/gradle.properties
index 60c65a8..40f3f77 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,11 +1,11 @@
 # Kotlin
 version=1.3.0-RC-SNAPSHOT
 group=org.jetbrains.kotlinx
-kotlin_version=1.3.41
+kotlin_version=1.3.50
 
 # Dependencies
 junit_version=4.12
-atomicfu_version=0.12.9
+atomicfu_version=0.12.10
 html_version=0.6.8
 lincheck_version=2.0
 dokka_version=0.9.16-rdev-2-mpp-hacks