Update NPM dependencies

Updated:
- autoprefixer v10.4.4 → v10.4.12
- browser-sync v2.27.9 → v2.27.10
- esbuild v0.14.27 → v0.14.54
- kleur v4.1.4 → v4.1.5
- postcss v8.4.12 → v8.4.17
- purgecss v4.1.3 → v4.1.3

package.json

@@ -21,15 +21,15 @@
         "svg4everybody": "^2.1.9"
     },
     "devDependencies": {
-        "autoprefixer": "^10.4.4",
-        "browser-sync": "^2.27.9",
+        "autoprefixer": "^10.4.12",
+        "browser-sync": "^2.27.10",
         "concat": "^1.0.3",
-        "esbuild": "^0.14.27",
-        "kleur": "^4.1.4",
+        "esbuild": "^0.14.54",
+        "kleur": "^4.1.5",
         "node-notifier": "^10.0.1",
         "node-sass": "^7.0.1",
-        "postcss": "^8.4.12",
-        "purgecss": "^4.1.3",
+        "postcss": "^8.4.17",
+        "purgecss": "^5.0.0",
         "svg-mixer": "^2.3.14",
         "tiny-glob": "^0.2.9"
     }