Fix docs build with sphinx 1.8

.gitignore

@@ -1,7 +1,8 @@
 node_modules/
 testproj/db.sqlite3
 testproj/staticfiles
-.vscode/
+\.pytest_cache/
+docs/\.doctrees/
 
 # Created by .ignore support plugin (hsz.mobi)
 ### Python template
@@ -159,5 +160,3 @@ com_crashlytics_export_strings.xml
 crashlytics.properties
 crashlytics-build.properties
 fabric.properties
-
-\.pytest_cache/

.idea/drf-yasg.iml

@@ -18,6 +18,7 @@
       <sourceFolder url="file://$MODULE_DIR$/testproj" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/.pytest_cache" />
       <excludeFolder url="file://$MODULE_DIR$/dist" />
+      <excludeFolder url="file://$MODULE_DIR$/docs/.doctrees" />
       <excludeFolder url="file://$MODULE_DIR$/docs/_build" />
       <excludeFolder url="file://$MODULE_DIR$/htmlcov" />
       <excludeFolder url="file://$MODULE_DIR$/src/drf_yasg.egg-info" />

docs/conf.py

@@ -155,7 +155,9 @@ texinfo_documents = [
      'Miscellaneous'),
 ]
 
-autodoc_default_flags = ['private-members']
+autodoc_default_options = {
+    'private-members': None
+}
 autodoc_member_order = 'bysource'
 autoclass_content = 'both'
 autodoc_mock_imports = []