chore(deps): update dependency @1stg/lib-config to ^1.2.8

Author: renovate-bot

package.json

@@ -20,7 +20,7 @@
     "typecov": "type-coverage"
   },
   "devDependencies": {
-    "@1stg/lib-config": "^1.1.9",
+    "@1stg/lib-config": "^1.2.8",
     "@types/jest": "^26.0.20",
     "@types/node": "^14.14.34",
     "lerna": "^4.0.0",