chore(deps): update dependency postcss to v8.4.2

Author: renovate-bot

package.json

@@ -28,7 +28,7 @@
     "@types/node": "16.11.10",
     "babel-plugin-tester": "10.1.0",
     "jest": "27.1.0",
-    "postcss": "8.3.11",
+    "postcss": "8.4.2",
     "prettier": "2.3.2",
     "tailwindcss": "2.2.2",
     "ts-jest": "27.0.4",

yarn.lock

@@ -4188,14 +4188,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.3.11":
-  version: 8.3.11
-  resolution: "postcss@npm:8.3.11"
+"postcss@npm:8.4.2":
+  version: 8.4.2
+  resolution: "postcss@npm:8.4.2"
   dependencies:
     nanoid: ^3.1.30
     picocolors: ^1.0.0
-    source-map-js: ^0.6.2
-  checksum: fa1530f7e1817bcaf40b34db246d0c49e42daf12719abd4a3a1b5886491cca125af6b21ccdfc24a074ea9b6b73a6677e1478906adb732b2bd5208077a64473a6
+    source-map-js: ^1.0.1
+  checksum: 359d1ff70a727f8a6dc78abd49de9f46ef6ec1fb5d8917b3fc5a8829d198201e609118acf00fc7365531b4502fc061f3e1749520e494983efea02c29dbbc726b
   languageName: node
   linkType: hard
 
@@ -4609,6 +4609,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"source-map-js@npm:^1.0.1":
+  version: 1.0.1
+  resolution: "source-map-js@npm:1.0.1"
+  checksum: 8096794b7d64f9bc74738f6b8731cbd9f32d81384b16d3bea55ac8bc69fd80e1b8cfb99d638b4c6df5c111ce363c55b4b51a8abd9e609357460c82305ee59471
+  languageName: node
+  linkType: hard
+
 "source-map-support@npm:^0.5.6":
   version: 0.5.19
   resolution: "source-map-support@npm:0.5.19"
@@ -4828,7 +4835,7 @@ __metadata:
     babel-plugin-macros: ^3.1.0
     babel-plugin-tester: 10.1.0
     jest: 27.1.0
-    postcss: 8.3.11
+    postcss: 8.4.2
     prettier: 2.3.2
     tailwindcss: 2.2.2
     ts-jest: 27.0.4