Bump mixin-deep from 1.3.0 to 1.3.2 in /packages/subscription-widget

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.0 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](jonschlinkert/mixin-deep@1.3.0...1.3.2)

Signed-off-by: dependabot[bot] <support@github.com>

packages/subscription-widget/yarn.lock

@@ -1274,8 +1274,8 @@ minimist@^1.2.0:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
 mixin-deep@^1.2.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.0.tgz#47a8732ba97799457c8c1eca28f95132d7e8150a"
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.2.tgz#1120b43dc359a785dce65b55b82e257ccf479566"
   dependencies:
     for-in "^1.0.2"
     is-extendable "^1.0.1"