build: update Dagger

Change-Id: I56064c4ceae032328fdf69e87a12db65ed27f00e
diff --git a/ring-android/app/build.gradle b/ring-android/app/build.gradle
index 6b83769..511de33 100644
--- a/ring-android/app/build.gradle
+++ b/ring-android/app/build.gradle
@@ -77,7 +77,7 @@
 }
 
 dependencies {
-    def dagger_version = '2.28.3'
+    def dagger_version = '2.29.1'
 
     implementation fileTree(include: '*.jar', dir: 'libs')
     implementation project(':libringclient')