Add method to get latest release of a repository (#609)

github/Repository.py

@@ -2119,6 +2119,17 @@ class Repository(github.GithubObject.CompletableGithubObject):
             )
             return github.GitRelease.GitRelease(self._requester, headers, data, completed=True)
 
+    def get_latest_release(self):
+        """
+        :calls: `GET /repos/:owner/:repo/releases/latest https://developer.github.com/v3/repos/releases/#get-the-latest-release
+        :rtype: :class:`github.GitRelease.GitRelease`
+        """
+        headers, data = self._requester.requestJsonAndCheck(
+            "GET",
+            self.url + "/releases/latest"
+        )
+        return github.GitRelease.GitRelease(self._requester, headers, data, completed=True)
+
     def get_teams(self):
         """
         :calls: `GET /repos/:owner/:repo/teams <http://developer.github.com/v3/repos>`_

github/tests/GitRelease.py

@@ -86,6 +86,11 @@ class Release(Framework.TestCase):
         self.assertEqual(self.release.author._rawData['login'], "edhollandAL")
         self.assertEqual(self.release.html_url, "https://github.com/edhollandAL/PyGithub/releases/tag/v3.0.0")
 
+    def testGetLatestRelease(self):
+        self.repo = self.g.get_user().get_repo('PyGithub')
+        latest_release = self.repo.get_latest_release()
+        self.assertEqual(latest_release.tag_name, "v1.25.2")
+
     def testGetAsset(self):
         """
         Test retrieving a release asset directly by its ID.