Update to OkHttp 3.4.0.

pom.xml

@@ -49,7 +49,7 @@
 
     <!-- Dependencies -->
     <android.version>4.1.1.4</android.version>
-    <okhttp.version>3.3.0</okhttp.version>
+    <okhttp.version>3.4.0</okhttp.version>
     <animal.sniffer.version>1.14</animal.sniffer.version>
 
     <!-- Adapter Dependencies -->

retrofit-converters/moshi/pom.xml

@@ -23,7 +23,7 @@
       <groupId>com.squareup.moshi</groupId>
       <artifactId>moshi</artifactId>
     </dependency>
-    <!-- TODO remove this dependency once Moshi or OkHttp ships with 1.9.0 or newer. -->
+    <!-- TODO remove this dependency once Moshi ships with 1.9.0 or newer. -->
     <dependency>
       <groupId>com.squareup.okio</groupId>
       <artifactId>okio</artifactId>