Add more sizes for apple-touch-icon

[pavlexander]

Add more sizes for apple-touch-icon

[atjn]

Hello and thanks for the suggestion :)

According to Apple's developer documentation:

If there is no icon that matches the recommended size for the device, the smallest icon larger than the recommended size is used.

In other words, if you provide a very large icon, then Safari will automatically scale it down to fit the required size. Since pwa-asset-generator would also just scale the icon down if it were to provide smaller sizes, we might as well omit that step, and save the extra processing time and bandwidth, and let that happen on the device only when it is needed, and only for the exact size that is needed.

I think your suggestion of documenting this design makes sense, but given that Safari 15.4+ now supports standard web manifest icons, I think we are now looking at removing that part of the program entirely, and along with it its documentation.

[atjn]

In any case - it would be nice if users could define output image size themselves, so they could set-up some automation routines for everchanging OS requirements to avoid waiting for fixes from dev in cases such as this.

This feature is definitely being considered, although I am unsure whether it is actually necessary now that all browsers support the web app manifest, which allows you to serve a few standard sizes, and then let the device resize them as needed. This specific request is a duplicate of #446