Bump postcss-import from 15.1.0 to 16.1.0 (#1561)

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 15.1.0 to 16.1.0.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@15.1.0...16.1.0)

---
updated-dependencies:
- dependency-name: postcss-import
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -89,7 +89,7 @@
     "pad-start": "^1.0.2",
     "parse-git-config": "^3.0.0",
     "postcss": "^8.3.6",
-    "postcss-import": "^15.1.0",
+    "postcss-import": "^16.1.0",
     "postcss-nested": "^6.0.1",
     "postcss-scss": "^4.0.0",
     "quick-temp": "^0.1.8",

yarn.lock

@@ -12524,10 +12524,10 @@ postcss-functions@^3.0.0:
     postcss "^6.0.9"
     postcss-value-parser "^3.3.0"
 
-postcss-import@^15.1.0:
-  version "15.1.0"
-  resolved "https://registry.yarnpkg.com/postcss-import/-/postcss-import-15.1.0.tgz#41c64ed8cc0e23735a9698b3249ffdbf704adc70"
-  integrity sha512-hpr+J05B2FVYUAXHeK1YyI267J/dDDhMU6B6civm8hSY1jYJnBXxzKDKDswzJmtLHryrjhnDjqqp/49t8FALew==
+postcss-import@^16.1.0:
+  version "16.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-import/-/postcss-import-16.1.0.tgz#258732175518129667fe1e2e2a05b19b5654b96a"
+  integrity sha512-7hsAZ4xGXl4MW+OKEWCnF6T5jqBw80/EE9aXg1r2yyn1RsVEU8EtKXbijEODa+rg7iih4bKf7vlvTGYR4CnPNg==
   dependencies:
     postcss-value-parser "^4.0.0"
     read-cache "^1.0.0"