Bump autoprefixer from 9.7.2 to 9.7.3 (#29787)

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.7.2 to 9.7.3.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/9.7.2...9.7.3)

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

package-lock.json

@@ -1350,18 +1350,37 @@
       "dev": true
     },
     "autoprefixer": {
-      "version": "9.7.2",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-9.7.2.tgz",
-      "integrity": "sha512-LCAfcdej1182uVvPOZnytbq61AhnOZ/4JelDaJGDeNwewyU1AMaNthcHsyz1NRjTmd2FkurMckLWfkHg3Z//KA==",
+      "version": "9.7.3",
+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-9.7.3.tgz",
+      "integrity": "sha512-8T5Y1C5Iyj6PgkPSFd0ODvK9DIleuPKUPYniNxybS47g2k2wFgLZ46lGQHlBuGKIAEV8fbCDfKCCRS1tvOgc3Q==",
       "dev": true,
       "requires": {
-        "browserslist": "^4.7.3",
-        "caniuse-lite": "^1.0.30001010",
+        "browserslist": "^4.8.0",
+        "caniuse-lite": "^1.0.30001012",
         "chalk": "^2.4.2",
         "normalize-range": "^0.1.2",
         "num2fraction": "^1.2.2",
         "postcss": "^7.0.23",
         "postcss-value-parser": "^4.0.2"
+      },
+      "dependencies": {
+        "browserslist": {
+          "version": "4.8.0",
+          "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.8.0.tgz",
+          "integrity": "sha512-HYnxc/oLRWvJ3TsGegR0SRL/UDnknGq2s/a8dYYEO+kOQ9m9apKoS5oiathLKZdh/e9uE+/J3j92qPlGD/vTqA==",
+          "dev": true,
+          "requires": {
+            "caniuse-lite": "^1.0.30001012",
+            "electron-to-chromium": "^1.3.317",
+            "node-releases": "^1.1.41"
+          }
+        },
+        "electron-to-chromium": {
+          "version": "1.3.321",
+          "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.321.tgz",
+          "integrity": "sha512-jJy/BZK2s2eAjMPXVMSaCmo7/pSY2aKkfQ+LoAb5Wk39qAhyP9r8KU74c4qTgr9cD/lPUhJgReZxxqU0n5puog==",
+          "dev": true
+        }
       }
     },
     "aws-sign2": {

package.json

@@ -90,7 +90,7 @@
     "@babel/core": "^7.7.4",
     "@babel/plugin-proposal-object-rest-spread": "^7.7.4",
     "@babel/preset-env": "^7.7.4",
-    "autoprefixer": "^9.7.2",
+    "autoprefixer": "^9.7.3",
     "babel-eslint": "^10.0.3",
     "babel-plugin-istanbul": "^5.2.0",
     "bundlesize": "^0.18.0",