Fix trailing slash before GET query parameters

[szymongalaska]

Summary

GET requests with query parameters currently append /? to the endpoint URL.

For example:

https://api.spotify.com/v1/me/player/recently-played/?limit=10

Spotify returns a 404 response for this URL, while the canonical URL without the trailing slash succeeds:

https://api.spotify.com/v1/me/player/recently-played?limit=10

Changes

• Change GET query string construction from /? to ?.
• Update the corresponding test to ensure query parameters do not modify the endpoint path.

Verification

Confirmed that:

$api->getMyRecentTracks([
    'limit' => 10,
]);

returns a 404 response before this change and returns the expected recently played tracks after the change.

• composer test
• composer lint

[jwilsson]

Awesome! Thanks for the fix!