Add new umami tracking config props (#3)

* Add dataCache and dataDomains props

* Add new props to README

* Fix defaults of new props

* Increase version to 0.1.4

* Add package-lock.json

Author: ohrie

README.md

@@ -20,7 +20,9 @@ plugins: [
       srcUrl: 'https://umami.example.com/umami.js',
       includeInDevelopment: false,
       autoTrack: true,
-      respectDoNotTrack: true
+      respectDoNotTrack: true,
+      dataCache: false,
+      dataDomains: 'example.com,example2.com'
     },
   },
 ]
@@ -33,6 +35,8 @@ plugins: [
 - `includeInDevelopment` - Optional. Defaults to `false`
 - `autoTrack` - Optional. Enables [umami auto track](https://umami.is/docs/tracker-config) feature. Defaults to `true`
 - `respectDoNotTrack` - Optional. Enables [umami respect Do Not Track](https://umami.is/docs/tracker-config) feature. Defaults to `true`
+- `dataCache` - Optional. Improves performance. Defaults to `false`
+- `dataDomains` - Optional. Allows tracking only on the specified domains. No default.