Set version to 0.5.0-SNAPSHOT

Author: eikek

app/build.gradle

@@ -8,8 +8,8 @@ android {
         applicationId "org.docspell.docspellshare"
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 4
-        versionName "0.4.0"
+        versionCode 5
+        versionName "0.5.0-SNAPSHOT"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }