update version

Change-Id: If2a975ac874bf0a4b55ba3485f00f03e1c885f93

ring-android/app/build.gradle

@@ -9,8 +9,8 @@ android {
     defaultConfig {
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 258
-        versionName "20200912-01"
+        versionCode 259
+        versionName "20200913-01"
     }
     sourceSets {
         main {
@@ -95,7 +95,7 @@ dependencies {
     implementation "androidx.percentlayout:percentlayout:1.0.0"
     implementation "com.google.android.material:material:1.2.1"
     implementation 'com.google.android:flexbox:1.1.1'
-    implementation 'org.osmdroid:osmdroid-android:6.1.7'
+    implementation 'org.osmdroid:osmdroid-android:6.1.8'
 
     // ORM
     implementation 'com.j256.ormlite:ormlite-android:5.1'