Update changelog for 2.8.0

CHANGELOG.md

 Change Log
 ==========
 
+Version 2.8.0 *(2020-03-23)*
+----------------------------
+
+ * New: Add `Call.timeout()` which returns the `okio.Timeout` of the full call.
+ * Fix: Change `Call.awaitResponse()` to accept a nullable response type.
+ * Fix: Support default methods on Java 14+. We had been working around a bug in earlier versions of
+   Java. That bug was fixed in Java 14, and the fix broke our workaround.
+
+
 Version 2.7.2 *(2020-02-24)*
 ----------------------------
 

README.md

@@ -9,7 +9,7 @@ For more information please see [the website][1].
 Download
 --------
 
-Download [the latest JAR][2] or grab from Maven central at the coordinates `com.squareup.retrofit2:retrofit:2.7.2`.
+Download [the latest JAR][2] or grab from Maven central at the coordinates `com.squareup.retrofit2:retrofit:2.8.0`.
 
 Snapshots of the development version are available in [Sonatype's `snapshots` repository][snap].
 

pom.xml

@@ -83,7 +83,7 @@
     <url>https://github.com/square/retrofit</url>
     <connection>scm:git:git://github.com/square/retrofit.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/square/retrofit.git</developerConnection>
-    <tag>parent-2.7.0</tag>
+    <tag>parent-2.8.0</tag>
   </scm>
 
   <issueManagement>