Update type hints with docstrings and more API coverage.

Author: jbaiter

.prettierrc

@@ -15,5 +15,8 @@
   "tabWidth": 2,
   "trailingComma": "all",
   "useTabs": false,
-  "vueIndentScriptAndStyle": false
+  "vueIndentScriptAndStyle": false,
+  "plugins": [
+    "prettier-plugin-jsdoc"
+  ]
 }