deprecation warning; !default should only be written once for each variable.

[EKoetsjarjan]

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used patch-package to patch react-widgets@5.8.4 for the project I'm working on.

I have got a deprecation warning

!default should only be written once for each variable.
This will be an error in Dart Sass 2.0.0.
   ╷
10 │ $box-shadow-up: 0 0.5em 1em rgba(#000, 0.175) !default !default;
   │                                                        ^^^^^^^^
   ╵

Here is the diff that solved the warning:

diff --git a/node_modules/react-widgets/scss/popup.scss b/node_modules/react-widgets/scss/popup.scss
index 3ddc5c5..9c812a7 100644
--- a/node_modules/react-widgets/scss/popup.scss
+++ b/node_modules/react-widgets/scss/popup.scss
@@ -7,7 +7,7 @@ $border: $widget-border-color !default;
 $border-radius: $widget-border-radius !default;
 $box-shadow-offset: 1em !default;
 $box-shadow: 0 0.5em 1em rgba(#000, 0.175) !default;
-$box-shadow-up: 0 0.5em 1em rgba(#000, 0.175) !default !default;
+$box-shadow-up: 0 0.5em 1em rgba(#000, 0.175) !default;
 
 $zindex: 1005 !default;
 $zindex-focused: $zindex + 1 !default;

This issue body was partially generated by patch-package.