update dependencies

build.gradle

@@ -34,9 +34,3 @@ dependencies {
     // Use JUnit test framework
     testImplementation 'junit:junit:4.12'
 }
-
-compileKotlin {
-    kotlinOptions {
-        freeCompilerArgs = [ disableImplicitReflectionSerializerAnnotation ]
-    }
-}

gradle.properties

@@ -5,6 +5,8 @@ kotlin_serialisation_runtime_version=1.2.0
 joda_time_version=2.10.1
 ktor_version=1.1.4
 
+android.useAndroidX=true
+
 gradle_bintray_plugin_version=1.8.4
 
 disableImplicitReflectionSerializerAnnotation=-Xexperimental=kotlinx.serialization.ImplicitReflectionSerializer