Dependency updates. OkHttp nullability changes

app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt

@@ -380,7 +380,7 @@ class Downloader(private val context: Context, private val provider: DownloadPro
                 .map { response ->
                     val file = tmpDir.createFile("$filename.tmp")
                     try {
-                        response.body().source().saveTo(file.openOutputStream())
+                        response.body()!!.source().saveTo(file.openOutputStream())
                         val extension = getImageExtension(response, file)
                         file.renameTo("$filename.$extension")
                     } catch (e: Exception) {
@@ -403,7 +403,7 @@ class Downloader(private val context: Context, private val provider: DownloadPro
      */
     private fun getImageExtension(response: Response, file: UniFile): String {
         // Read content type if available.
-        val mime = response.body().contentType()?.let { ct -> "${ct.type()}/${ct.subtype()}" }
+        val mime = response.body()?.contentType()?.let { ct -> "${ct.type()}/${ct.subtype()}" }
             // Else guess from the uri.
             ?: context.contentResolver.getType(file.uri)
             // Else read magic numbers.