chore(deps-dev): bump rollup-plugin-postcss from 3.1.5 to 3.1.8

Bumps [rollup-plugin-postcss](https://github.com/egoist/rollup-plugin-postcss) from 3.1.5 to 3.1.8.
- [Release notes](https://github.com/egoist/rollup-plugin-postcss/releases)
- [Changelog](https://github.com/egoist/rollup-plugin-postcss/blob/master/CHANGELOG-OLD.md)
- [Commits](https://github.com/egoist/rollup-plugin-postcss/compare/v3.1.5...v3.1.8)

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

package-lock.json

@@ -7401,9 +7401,9 @@
       "dev": true
     },
     "eventemitter3": {
-      "version": "4.0.4",
-      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.4.tgz",
-      "integrity": "sha512-rlaVLnVxtxvoyLsQQFBx53YmXHDxRIzzTLbdfxqi4yocpSjAxXwkU0cScM5JgSKMqEhrZpnvQ2D9gjylR0AimQ==",
+      "version": "4.0.7",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.7.tgz",
+      "integrity": "sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==",
       "dev": true
     },
     "execa": {
@@ -11487,9 +11487,9 @@
       "dev": true
     },
     "rollup-plugin-postcss": {
-      "version": "3.1.5",
-      "resolved": "https://registry.npmjs.org/rollup-plugin-postcss/-/rollup-plugin-postcss-3.1.5.tgz",
-      "integrity": "sha512-oPD3ubb1JDBwzNMca+OZUpYxyxrIw9ihhUyvEbOwzzj0rR2UEKm8GtfhFXVGDWwBGp5HIK8ss/r8vRStYDddRA==",
+      "version": "3.1.8",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-postcss/-/rollup-plugin-postcss-3.1.8.tgz",
+      "integrity": "sha512-JHnGfW8quNc6ePxEkZ05HEZ1YiRxDgY9RKEetMfsrwxR2kh/d90OVScTc6b1c2Q17Cs/5TRYL+1uddG21lQe3w==",
       "dev": true,
       "requires": {
         "chalk": "^4.0.0",
@@ -11574,9 +11574,9 @@
           }
         },
         "supports-color": {
-          "version": "7.1.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.1.0.tgz",
-          "integrity": "sha512-oRSIpR8pxT1Wr2FquTNnGet79b3BWljqOuoW/h4oBhxJ/HUbX5nX6JSruTkvXDCFMwDPvsaTTbvMLKZWSy0R5g==",
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
           "dev": true,
           "requires": {
             "has-flag": "^4.0.0"

package.json

@@ -59,7 +59,7 @@
     "rollup-plugin-livereload": "^1.3.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-peer-deps-external": "^2.2.3",
-    "rollup-plugin-postcss": "^3.1.5",
+    "rollup-plugin-postcss": "^3.1.8",
     "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-serve": "^1.0.4",
     "rollup-plugin-terser": "^7.0.1",