Update npm dependencies (#1516)

.stylelintrc.json

@@ -1,6 +1,6 @@
 {
     "extends": [
-        "stylelint-config-wordpress/scss"
+        "@wordpress/stylelint-config/scss"
     ],
     "ignoreFiles": [
         "sass/_normalize.scss"

package.json

@@ -17,10 +17,10 @@
     "url": "https://github.com/Automattic/_s/issues"
   },
   "devDependencies": {
-    "@wordpress/scripts": "^12.1.0",
+    "@wordpress/scripts": "^19.2.2",
     "dir-archiver": "^1.1.1",
-    "node-sass": "^4.14.1",
-    "rtlcss": "^2.5.0"
+    "node-sass": "^7.0.1",
+    "rtlcss": "^3.5.0"
   },
   "rtlcssConfig": {
     "options": {