fix CI failing when running yalc-publish

Author: Romex91

package.json

@@ -63,7 +63,7 @@
     "start": "nps",
     "prepack": "nps build.prepack",
     "prepare": "nps build.prepack",
-    "prepublishOnly": "yarn run build && attw --profile esm-only --pack .",
+    "prepublishOnly": "yarn run build && (command -v attw >/dev/null && attw --profile esm-only --pack . || (echo 'attw not found, skipping' && exit 0))",
     "build": "yarn run clean && yarn run tsc --declaration",
     "build-watch": "yarn run clean && yarn run tsc --watch",
     "lint": "nps eslint",