chore(deps-dev): bump postcss-nested from 4.1.2 to 4.2.1

Bumps [postcss-nested](https://github.com/postcss/postcss-nested) from 4.1.2 to 4.2.1.
- [Release notes](https://github.com/postcss/postcss-nested/releases)
- [Changelog](https://github.com/postcss/postcss-nested/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss-nested/compare/4.1.2...4.2.1)

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

package-lock.json

@@ -6403,13 +6403,58 @@
       }
     },
     "postcss-nested": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/postcss-nested/-/postcss-nested-4.1.2.tgz",
-      "integrity": "sha512-9bQFr2TezohU3KRSu9f6sfecXmf/x6RXDedl8CHF6fyuyVW7UqgNMRdWMHZQWuFY6Xqs2NYk+Fj4Z4vSOf7PQg==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/postcss-nested/-/postcss-nested-4.2.1.tgz",
+      "integrity": "sha512-AMayXX8tS0HCp4O4lolp4ygj9wBn32DJWXvG6gCv+ZvJrEa00GUxJcJEEzMh87BIe6FrWdYkpR2cuyqHKrxmXw==",
       "dev": true,
       "requires": {
-        "postcss": "^7.0.14",
-        "postcss-selector-parser": "^5.0.0"
+        "postcss": "^7.0.21",
+        "postcss-selector-parser": "^6.0.2"
+      },
+      "dependencies": {
+        "cssesc": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz",
+          "integrity": "sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==",
+          "dev": true
+        },
+        "postcss": {
+          "version": "7.0.21",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.21.tgz",
+          "integrity": "sha512-uIFtJElxJo29QC753JzhidoAhvp/e/Exezkdhfmt8AymWT6/5B7W1WmponYWkHk2eg6sONyTch0A3nkMPun3SQ==",
+          "dev": true,
+          "requires": {
+            "chalk": "^2.4.2",
+            "source-map": "^0.6.1",
+            "supports-color": "^6.1.0"
+          }
+        },
+        "postcss-selector-parser": {
+          "version": "6.0.2",
+          "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.0.2.tgz",
+          "integrity": "sha512-36P2QR59jDTOAiIkqEprfJDsoNrvwFei3eCqKd1Y0tUsBimsq39BLp7RD+JWny3WgB1zGhJX8XVePwm9k4wdBg==",
+          "dev": true,
+          "requires": {
+            "cssesc": "^3.0.0",
+            "indexes-of": "^1.0.1",
+            "uniq": "^1.0.1"
+          }
+        },
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "6.1.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
+          "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
       }
     },
     "postcss-normalize-charset": {

package.json

@@ -29,7 +29,7 @@
     "babel-preset-react-app": "^9.0.2",
     "cypress": "^3.5.0",
     "husky": "^3.0.9",
-    "postcss-nested": "^4.1.2",
+    "postcss-nested": "^4.2.1",
     "prettier": "1.18.2",
     "prop-types": "^15.7.2",
     "react": "^16.11.0",