Merge pull request #4394 from nextcloud/390alpha

3.9.0 Alpha

build.gradle

@@ -78,7 +78,7 @@ repositories {
 
 // semantic versioning for version code
 def versionMajor = 3
-def versionMinor = 8
+def versionMinor = 9
 def versionPatch = 0
 def versionBuild = 0 // 0-50=Alpha / 51-98=RC / 90-99=stable