Merge pull request #375 from owncloud/dependabot/gradle/kotlinVersion-1.4.31

Bump kotlinVersion from 1.4.30 to 1.4.31

Author: abelgardep

build.gradle

@@ -1,6 +1,6 @@
 buildscript {
     ext {
-        kotlinVersion = '1.4.30'
+        kotlinVersion = '1.4.31'
         moshiVersion = "1.9.2"
     }