Upgrade Kotlin (1.2.0 => 1.2.10) and include proguard config file

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.2.0'
+    ext.kotlin_version = '1.2.10'
     repositories {
         jcenter()
         google()

library/build.gradle

@@ -11,6 +11,8 @@ android {
         targetSdkVersion TARGET_SDK
         versionCode 1
         versionName version
+
+        consumerProguardFiles 'lib-proguard-rules.pro'
     }
 }
 

library/lib-proguard-rules.pro

@@ -0,0 +1 @@
+-keep class ru.noties.markwon.** { *; }