added .png and .svg plus fixed test

Author: jasonwilliams

src/theme/mod.rs

@@ -180,6 +180,7 @@ mod tests {
             "css/variables.css",
             "book.js",
             "highlight.js",
+            "sw.js",
             "tomorrow-night.css",
             "highlight.css",
             "ayu-highlight.css",

src/theme/sw.js

@@ -30,7 +30,7 @@ workbox.routing.registerRoute(
 
 // Local resources
 workbox.routing.registerRoute(
-  new RegExp(".woff2?|.ttf|.css|.js|.json"),
+  new RegExp(".woff2?|.ttf|.css|.js|.json|.png|.svg"),
   staleWhileRevalidate
 );