housekeeping tasks (#464)

* update settings to use black

* update python versions

* enquote version numbers

* update dependency

* set explicit build command

* add newline

* add command to checkout

* add run step

* chain

* sudo

* test

* newer sphinx version

* update sphinx

* clean up setuptools usage

* use tox

* install tox

* tox

.vscode/settings.json

@@ -1,11 +1,14 @@
 {
-    "restructuredtext.confPath": "${workspaceFolder}/doc",
-    "files.watcherExclude": {
-        "**/.git/objects/**": true,
-        "**/.git/subtree-cache/**": true,
-        "**/node_modules/*/**": true,
-        "**/.eggs/**": true,
-        "**/.hypothesis/**": true,
-        "**/.tox/**": true,
-      }
+  "restructuredtext.confPath": "${workspaceFolder}/doc",
+  "files.watcherExclude": {
+    "**/.git/objects/**": true,
+    "**/.git/subtree-cache/**": true,
+    "**/node_modules/*/**": true,
+    "**/.eggs/**": true,
+    "**/.hypothesis/**": true,
+    "**/.tox/**": true,
+  },
+  "editor.formatOnSave": true,
+  "editor.formatOnPaste": true,
+  "python.formatting.provider": "black",
 }