large bundle size

[YannikG]

Describe the bug
I just ran the source-map-explorer on my project and noticed this package uses around 400KB (or ~23% of my entire main.js).

To Reproduce
Steps to reproduce the behavior

1. install source-map-explorer
2. run source-map-explorer on any angular project using "@angular-material-extensions/select-country": "^8.1.0"
3. look at the report

Expected behavior
I would assume for this small extension a much smaller bundle size. @angular/material just uses 100KB more than @angular-material-extensions/select-country.

I really appreciate this project, but if I'm not able to reduce the bundle size, I have to ditch this extension and just use a regular old select.

Screenshots
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Additional context
Did I do something wrong? Have I missed an important information?

Appreciate your help.

[AnthonyNahas]

I would appreciate a PR