Bump github-api to 1.57

Pull request #112 about orgs/teams fetching from GitHub has been merged
into master and released in github-api 1.57.

Temporary enabling GerritForge snapshot repository for downloading the
jar/pom files as they are not yet published to maven central.

Change-Id: I1f69bece3a55a78b45b8b4dab5afd5bac46ff3bd

github-oauth/pom.xml

diff --git a/github-oauth/pom.xml b/github-oauth/pom.xml
index f472e8a..6a55e54 100644
--- a/github-oauth/pom.xml
+++ b/github-oauth/pom.xml
@@ -107,7 +107,7 @@
     <dependency>
       <groupId>org.kohsuke</groupId>
       <artifactId>github-api</artifactId>
-      <version>1.57-SNAPSHOT</version>
+      <version>1.57</version>
     </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>

pom.xml

diff --git a/pom.xml b/pom.xml
index 1c22a9e..e65c897 100644
--- a/pom.xml
+++ b/pom.xml
@@ -260,7 +260,7 @@
     </repository>
     <repository>
       <releases>
-        <enabled>false</enabled>
+        <enabled>true</enabled>
       </releases>
       <snapshots>
         <enabled>true</enabled>