match import rules containing semi-colons

[trepmal]

The regex does not properly match import declarations if the URL contains a semi-colon. Example:

@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&family=Source+Sans+Pro:ital,wght@0,300;0,400;1,300;1,400&display=swap");

In this case, the regex will leave this at the top of the concatenated css file:

@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;

The unclosed statement then eats whatever follows, potentially accidentally closed by coincidence of other CSS.

The regex change ensures a non-word character before the declaration-ending ;.

---

I enqueued and tested against a stylesheet with the following contents:

@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap");
@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap');
@import url ("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap");
@import url ('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap');
@import "https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap";
@import 'https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap';

body:before {
    content: "testing";
}

@import url("https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap");
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap');
@import url ("https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap");
@import url ('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap');
@import "https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap";
@import 'https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital&display=swap';

body {
    background: purple !important;
}

[trepmal]

for the upstream library used, a fix has been added, however it seems we do not use this part of the library