fix(deps): update dependency @tresjs/post-processing to v2

Author: renovate[bot]

package.json

@@ -9,7 +9,7 @@
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx,.vue"
   },
   "dependencies": {
-    "@tresjs/post-processing": "1.0.0-next.1",
+    "@tresjs/post-processing": "2.1.0",
     "mdast-util-to-string": "^4.0.0",
     "three": "^0.171.0",
     "three-custom-shader-material": "^6.2.1",