Merge https://github.com/jaraco/skeleton

Author: jaraco

.editorconfig

@@ -9,6 +9,7 @@ end_of_line = lf
 
 [*.py]
 indent_style = space
+max_line_length = 88
 
 [*.{yml,yaml}]
 indent_style = space

docs/conf.py

@@ -27,17 +27,19 @@
 # Be strict about any broken references:
 nitpicky = True
 
-# Support intersphinx links
-extensions += [
-    'sphinx.ext.intersphinx',
-]
+# Include Python intersphinx mapping to prevent failures
+# jaraco/skeleton#51
+extensions += ['sphinx.ext.intersphinx']
 intersphinx_mapping = {
     'python': ('https://docs.python.org/3', None),
-    'importlib_resources': (
+}
+
+intersphinx_mapping.update(
+    importlib_resources=(
         'https://importlib-resources.readthedocs.io/en/latest/',
         None,
     ),
-}
+)
 
 # Workaround for #316
 nitpick_ignore = [