github3.py library updated so we can use it now

requirements.txt

@@ -1,7 +1,7 @@
 cffi==1.3.0
 cryptography==1.0.2
 enum34==1.0.4
--e git+https://github.com/ryanpitts/github3.py.git@74c4c5338606a89b794a1052046969995fa83336#egg=github3.py-origin/develop
+github3.py==0.9.4
 gspread==0.2.5
 httplib2==0.9.2
 idna==2.0

update_mozfest_schedule.py

@@ -296,7 +296,7 @@ def commit_json(data, target_config=GITHUB_CONFIG, commit=COMMIT_JSON_TO_GITHUB)
     repo = gh.repository(target_config['REPO_OWNER'], target_config['REPO_NAME'])
     
     # check to see whether data file exists
-    contents = repo.file_contents(
+    contents = repo.contents(
         path=target_config['TARGET_FILE'],
         ref=target_config['TARGET_BRANCH']
     )
@@ -312,9 +312,11 @@ def commit_json(data, target_config=GITHUB_CONFIG, commit=COMMIT_JSON_TO_GITHUB)
             )
         else:
             # update existing file
-            contents.update(
+            repo.update_file(
+                path=target_config['TARGET_FILE'],
                 message='updating session data',
                 content=data,
+                sha=contents.sha,
                 branch=GITHUB_CONFIG['TARGET_BRANCH']
         )