Use our OkHttpClient in updates checker. It should fix the updater on KitKat due to TLS

app/src/main/java/eu/kanade/tachiyomi/data/updater/GithubService.kt

@@ -1,10 +1,13 @@
 package eu.kanade.tachiyomi.data.updater
 
+import eu.kanade.tachiyomi.network.NetworkHelper
 import retrofit2.Retrofit
 import retrofit2.adapter.rxjava.RxJavaCallAdapterFactory
 import retrofit2.converter.gson.GsonConverterFactory
 import retrofit2.http.GET
 import rx.Observable
+import uy.kohesive.injekt.Injekt
+import uy.kohesive.injekt.api.get
 
 /**
  * Used to connect with the Github API.
@@ -17,6 +20,7 @@ interface GithubService {
                     .baseUrl("https://api.github.com")
                     .addConverterFactory(GsonConverterFactory.create())
                     .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
+                    .client(Injekt.get<NetworkHelper>().client)
                     .build()
 
             return restAdapter.create(GithubService::class.java)

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutController.kt

@@ -126,6 +126,7 @@ class SettingsAboutController : SettingsController() {
                         }
                     }
                 }, { error ->
+                    activity?.toast(error.message)
                     Timber.e(error)
                 })
     }

app/src/main/java/eu/kanade/tachiyomi/util/ContextExtensions.kt

@@ -36,7 +36,7 @@ fun Context.toast(@StringRes resource: Int, duration: Int = Toast.LENGTH_SHORT)
  * @param duration the duration of the toast. Defaults to short.
  */
 fun Context.toast(text: String?, duration: Int = Toast.LENGTH_SHORT) {
-    Toast.makeText(this, text, duration).show()
+    Toast.makeText(this, text.orEmpty(), duration).show()
 }
 
 /**