Updated for 4.7.7

Author: gmessner

README.md

@@ -11,7 +11,7 @@ To utilize the GitLab API for Java in your project, simply add the following dep
 ```java
 dependencies {
     ...
-    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.7.6'
+    compile group: 'org.gitlab4j', name: 'gitlab4j-api', version: '4.7.7'
 }
 ```
 
@@ -20,7 +20,7 @@ dependencies {
 <dependency>
     <groupId>org.gitlab4j</groupId>
     <artifactId>gitlab4j-api</artifactId>
-    <version>4.7.6</version>
+    <version>4.7.7</version>
 </dependency>
 ```