Update Syphon to 0.0.23 (23)

Also enable autoupdates.

metadata/org.tether.tether.yml

@@ -3,10 +3,17 @@ Categories:
   - Connectivity
   - Security
 License: AGPL-3.0-only
+AuthorName: Taylor Ereio
+AuthorEmail: contact@syphon.org
+AuthorWebSite: https://syphon.org
+WebSite: https://syphon.org/
 SourceCode: https://github.com/syphon-org/syphon
 IssueTracker: https://github.com/syphon-org/syphon/issues
+Changelog: https://github.com/syphon-org/syphon/releases
+LiberapayID: '1700671'
 
 AutoName: Syphon
+Summary: A privacy centric matrix client
 Description: |-
     Please be aware Syphon is still in Open Alpha
 
@@ -37,7 +44,25 @@ Builds:
       - $$flutter$$/bin/flutter build apk
     ndk: r21d
 
-AutoUpdateMode: None
+  - versionName: 0.0.23
+    versionCode: 23
+    commit: 0.0.23
+    submodules: true
+    output: build/app/outputs/apk/release/app-release.apk
+    srclibs:
+      - flutter@1.17.5
+    prebuild:
+      - echo 'android.applicationVariants.all { variant -> variant.outputs.all { output
+        -> outputFileName = "app-${output.baseName}.apk" } }' >> android/app/build.gradle
+      - $ANDROID_HOME/tools/bin/sdkmanager 'cmake;3.10.2.4988404'
+    build:
+      - $$flutter$$/bin/flutter config --no-analytics
+      - $$flutter$$/bin/flutter packages pub get
+      - $$flutter$$/bin/flutter pub run build_runner build
+      - $$flutter$$/bin/flutter build apk
+    ndk: r21d
+
+AutoUpdateMode: Version %v
 UpdateCheckMode: Tags
-CurrentVersion: 0.0.16
-CurrentVersionCode: 6
+CurrentVersion: 0.0.23
+CurrentVersionCode: 23