Fix url params in post url

[justinmaurerdotdev]

Description of the Change

This addresses/closes: #323

The Tweet URL was being escaped by esc_url(), which converts ampersands to HTML entities, breaking any query parameters.
Example: http://example.org/?p=16&utm_source=x&utm_medium=social&utm_campaign=my_test&utm_content=auto-tweet&utm_term=post

Changing the escaping to use esc_url_raw() seems appropriate (since the URL isn't intended for HTML rendering, but an actual link) and fixes the problem.
Example: "http://example.org/?p=16&utm_source=x&utm_medium=social&utm_campaign=my_test&utm_content=auto-tweet&utm_term=post

Note: It looks like PHPCBF got a little excited about replacing global class references (e.g. \WP_Post) with use statements in includes/utils.php. Let me know if those should not added and I can revert those bits.

How to test the Change

I've added test_filter_url_with_params() to TestPublish_Tweet.php, and it is working as expected (fails with esc_url() and succeeds with esc_url_raw(). But, you can also just add a filter to see the behavior.

add_filter(
	'autoshare_for_twitter_post_url',
	function ( $url ) {
		return add_query_arg( array(
			'utm_source'   => 'x',
			'utm_medium'   => 'social',
			'utm_campaign' => 'my_test',
			'utm_content'  => 'auto-tweet',
			'utm_term'     => 'post',
		), $url );
	}
);

Changelog Entry

Fixed - Ampersands no longer converted to HTML entities when adding query parameters to the post URL with the 'autoshare_for_twitter_post_url' filter.

Credits

Props @justinmaurerdotdev

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[iamdharmesh]

Thanks a lot for the PR @justinmaurerdotdev. LGTM.

[justinmaurerdotdev]

Thanks for getting it merged!