fix: bump ts config target to ES2018 (#4437)

Author: erikgb

tsconfig.json

@@ -4,7 +4,7 @@
         "jsx": "react",
         "resolveJsonModule": true,
         "skipLibCheck": true,
-        "target": "ES5",
+        "target": "ES2018",
         "module": "CommonJS",
     },
     "include": [