Update dependency tslib to v2.6.0

Author: renovate[bot]

package.json

@@ -25,7 +25,7 @@
     "rollup-plugin-terser": "7.0.2",
     "spectron": "^19.0.0",
     "ts-node": "10.7.0",
-    "tslib": "2.3.1",
+    "tslib": "2.6.0",
     "typescript": "4.4.2"
   }
 }