Upgraded to Go version 1.24, updated dependencies.

Improved logging, updated dependencies.

Fixed serving default icon.

Switched to Chi router, improved CORS settings, only allow GET reques…

…ts, updated dependencies, upgraded to Go 1.20.

Updated dependencies.

Respond with default icon to "bad" requests (like keywords instead of…

… a valid URL).

Use caching headers to serve icons, opt out of Google's FLoC, updated…

… dependencies.

Added parameter to select a fallback icon and updated dependencies.

Removed deprecated package io/ioutil, the minimum Go version is now 1…

….16.

Fixed grouping sizes.