Merge pull request #1080 from plotly/renovate/postcss-combine-duplicated-selectors-10.x

Update dependency postcss-combine-duplicated-selectors to v10

Author: dmt0

package.json

@@ -83,7 +83,7 @@
     "mkdirp": "1.0.4",
     "node-sass": "4.14.1",
     "postcss": "8.1.0",
-    "postcss-combine-duplicated-selectors": "9.4.0",
+    "postcss-combine-duplicated-selectors": "10.0.2",
     "postcss-custom-properties": "8.0.11",
     "postcss-remove-root": "0.0.2",
     "prettier": "2.1.2",