Merge pull request #2264 from nextcloud/dependabot/gradle/com.google.code.gson-gson-2.9.1

Bump gson from 2.9.0 to 2.9.1

app/build.gradle

@@ -293,7 +293,7 @@ dependencies {
     implementation "com.afollestad.material-dialogs:bottomsheets:${materialDialogsVersion}"
     implementation "com.afollestad.material-dialogs:lifecycle:${materialDialogsVersion}"
 
-    implementation 'com.google.code.gson:gson:2.9.0'
+    implementation 'com.google.code.gson:gson:2.9.1'
     implementation 'com.google.android.exoplayer:exoplayer:2.18.1'
 
     implementation 'com.github.chrisbanes:PhotoView:2.3.0'