Enhanced offline (#249)

* Notification of updates & reloading

* Using version in service worker & allowing version to appear elsewhere

* Stupid file

* Ditching changelog for now. Using package json.

* Ugh.

src/lib/SnackBar/index.ts

@@ -8,12 +8,9 @@ export interface SnackOptions {
 function createSnack(message: string, options: SnackOptions): [Element, Promise<string>] {
   const {
     timeout = 0,
-    actions = [],
+    actions = ['dismiss'],
   } = options;
 
-  // Provide a default 'dismiss' action
-  if (!timeout && actions.length === 0) actions.push('dismiss');
-
   const el = document.createElement('div');
   el.className = style.snackbar;
   el.setAttribute('aria-live', 'assertive');