Update Feather to 4.26.0

[adriankirchner]

Hi and thank you for this handy composer package.
I just updated the feather icons to the current 4.26.0 release.

Tests are passing

➜ php vendor/bin/phpunit --verbose --bootstrap vendor/autoload.php tests/FeatherTest
PHPUnit 7.0.0 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.4.2

....                                                                4 / 4 (100%)

Time: 125 ms, Memory: 4.00MB

OK (4 tests, 285 assertions)

Please merge and release a new version.

[michaelsavchuk]

Awesome, thanks!