Make it compatible with commerce 3.x

Problem/Motivation

It seems it does not compatible with commerce 3.x.

Problem 1
    - Root composer.json requires drupal/commerce_shipping_pickup_api ^1.0 -> satisfiable by drupal/commerce_shipping_pickup_api[1.0.0, 1.0.1].
    - drupal/commerce_shipping_pickup_api[1.0.0, ..., 1.0.1] require drupal/commerce ^2.11 -> found drupal/commerce[2.11.0, ..., 2.40.0] but it conflicts with your root composer.json require (^3.0).

Steps to reproduce

Create a drupal project then
composer require 'drupal/commerce:^3.0'
composer require 'drupal/commerce_shipping_pickup_api:^1.0'

Proposed resolution

Support commerce 3.x, for example, commerce_shipping_pickup_api's composer.json would contains this:

"require": {
    "drupal/commerce": "^2.11 || ^3.0"
  }