Update dependency postcss to v8.4.19 (#7375)

Co-authored-by: Nrenovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

war/package.json

@@ -37,7 +37,7 @@
     "less": "4.1.3",
     "less-loader": "11.1.0",
     "mini-css-extract-plugin": "2.6.1",
-    "postcss": "8.4.18",
+    "postcss": "8.4.19",
     "postcss-loader": "7.0.1",
     "prettier": "2.7.1",
     "style-loader": "3.3.1",

war/yarn.lock

@@ -4077,7 +4077,7 @@ __metadata:
     less-loader: 11.1.0
     lodash: 4.17.21
     mini-css-extract-plugin: 2.6.1
-    postcss: 8.4.18
+    postcss: 8.4.19
     postcss-less: 6.0.0
     postcss-loader: 7.0.1
     prettier: 2.7.1
@@ -5482,7 +5482,18 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.4.18, postcss@npm:^8.4.17, postcss@npm:^8.4.18, postcss@npm:^8.4.7":
+"postcss@npm:8.4.19":
+  version: 8.4.19
+  resolution: "postcss@npm:8.4.19"
+  dependencies:
+    nanoid: ^3.3.4
+    picocolors: ^1.0.0
+    source-map-js: ^1.0.2
+  checksum: 62782723a385f92b7525f66d29614624de7c5643855423db3a5efd9287e677650300192749adddbbb6734cea9b1d5f5fd4f6ea00ca3f9a95dbbb88f835f5ca64
+  languageName: node
+  linkType: hard
+
+"postcss@npm:^8.4.17, postcss@npm:^8.4.18, postcss@npm:^8.4.7":
   version: 8.4.18
   resolution: "postcss@npm:8.4.18"
   dependencies: