Add getTeam by id function

src/main/java/org/kohsuke/github/GitHub.java

@@ -578,6 +578,13 @@ public class GitHub {
         return allMyTeams;
     }
 
+    /**
+     * Gets a sigle team by ID.
+     */
+    public GHTeam getTeam(int id) throws IOException {
+        return retrieve().to("/teams/" + id, GHTeam.class).wrapUp(this);
+    }
+    
     /**
      * Public events visible to you. Equivalent of what's displayed on https://github.com/
      */