Shipping method change key cost to price

[SirDomin]

Q	A
Branch?	1.9
Bug fix?	no
New feature?	no
BC breaks?	yes
Deprecations?	no
Related tickets
License	MIT

[AdamKasp]

is it enough? I thought that here we want to move logic from src/Sylius/Bundle/ApiBundle/View/CartShippingMethod.php to serializer, like in price on productVariant

[AdamKasp]

The base of this pull-request was changed, you need fetch and reset your local branch
if you want to add new commits to this pull request. Reset before you pull, else commits
may become messed-up.

Unless you added new commits (to this branch) locally that you did not push yet,
execute git fetch origin && git reset "shipping-method-price" to update your local branch.

Feel free to ask for assistance when you get stuck 👍

[GSadee]

Thank you, @SirDomin! 🥇