prepare for release

Author: jwfing

CHANGELOG.md

@@ -2,6 +2,21 @@
 
 Following is change logs for recently release versions, you can refer to [releases page](https://github.com/leancloud/java-unified-sdk/releases) for more details.
 
+## 8.2.9 release
+
+#### Break changes
+- None
+
+#### New features
+add some functions to LCLeaderboard:
+- LCLeaderboard#queryGroupStatistics(String memberType, String statisticName, List<String> targetKeys), for querying multiple entities' statistics.
+- LCLeaderboard#getGroupResults(List<String> groupUserIds, int skip, int limit, List<String> selectMemberKeys, List<String> includeStatistics), for querying multiple users' rankings.
+- LCLeaderboard#getAroundInGroupResults(List<String> groupUserIds, String targetId, int limit, List<String> selectMemberKeys, List<String> includeStatistics), for querying around rankings within multiple users.
+
+#### Optimization and fixed bugs
+- None.
+
+
 ## 8.2.8 release
 
 #### Break changes

android-sdk/build.gradle

@@ -30,7 +30,7 @@ allprojects {
 }
 
 ext {
-    sdkVersion = "8.2.8"
+    sdkVersion = "8.2.9"
     supportLibVersion = "26.1.0"
     converterVersion = "2.1.0"
     rxandroidVersion = "2.1.1"

android-sdk/gradle.properties

@@ -15,7 +15,7 @@ org.gradle.jvmargs=-Xmx1536m
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-VERSION_NAME=8.2.8
+VERSION_NAME=8.2.9
 VERSION_CODE=2695
 GROUP=cn.leancloud