Prepare release 2.7.8 (#536)

Author: vancexu

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 2.7.8
+- Fix get raw history 
+- Improve signal processing error and log 
+- Fix replay error when querying workflow that contains activity retry 
+
 ## 2.7.6
 - Fix getVersion override when added new version 
 - Add async signal to untypedstub 

README.md

@@ -31,12 +31,12 @@ Add *cadence-client* as a dependency to your *pom.xml*:
     <dependency>
       <groupId>com.uber.cadence</groupId>
       <artifactId>cadence-client</artifactId>
-      <version>2.7.6</version>
+      <version>2.7.8</version>
     </dependency>
 
 or to *build.gradle*:
 
-    compile group: 'com.uber.cadence', name: 'cadence-client', version: '2.7.6'
+    compile group: 'com.uber.cadence', name: 'cadence-client', version: '2.7.8'
 
 ## Documentation
 

build.gradle

@@ -37,7 +37,7 @@ googleJavaFormat {
 }
 
 group = 'com.uber.cadence'
-version = '2.7.6'
+version = '2.7.8'
 
 description = '''Uber Cadence Java Client'''