Migrate sw-precache to workbox-cli

Author: KittyGiraudel

Diff for: _config.yml

@@ -43,7 +43,7 @@ exclude:
   - node_modules
   - vendor
   - _bin
-  - sw-precache-config.js
+  - workbox-config.js
 
 markdown: kramdown
 kramdown:

Diff for: _plugins/generate-sw.rb

@@ -1,4 +1,4 @@
 Jekyll::Hooks.register :site, :post_write do |site|
-  result = `./node_modules/.bin/sw-precache --config=sw-precache-config.js --root=_site`
+  result = `./node_modules/.bin/workbox generateSW workbox-config.js`
   Jekyll.logger.info 'Generated ServiceWorker'
 end