Update Kontalk to 4.2.0-beta4 (401)

Signed-off-by: Daniele Ricci <daniele@casaricci.it>

metadata/org.kontalk.txt

@@ -663,6 +663,17 @@ Build:4.2.0-beta3,399
         sed -i -e '/fabric/d' ../build.gradle build.gradle
     scanignore=app/src/main/res/raw/truststore
 
+Build:4.2.0-beta4,401
+    commit=v4.2.0-beta4
+    subdir=app
+    submodules=yes
+    init=sed -i -e 's/signingConfig signingConfigs.release/{}/g' build.gradle && \
+        rm ../gradle.properties
+    gradle=basic
+    prebuild=sed -i -e "/crashlytics/,+2d" -e "/googleplayImplementation/d" build.gradle && \
+        sed -i -e '/fabric/d' ../build.gradle build.gradle
+    scanignore=app/src/main/res/raw/truststore
+
 Maintainer Notes:
 Summary and Description have been moved to the new localizable text files:
 https://f-droid.org/docs/All_About_Descriptions_Graphics_and_Screenshots