Set "target": "es2021"

tsconfig.json

@@ -3,7 +3,7 @@
         "esModuleInterop": true,
         "forceConsistentCasingInFileNames": true,
         "lib": [
-            "es2019"
+            "es2021"
         ],
         "module": "commonjs",
         "noFallthroughCasesInSwitch": true,
@@ -16,7 +16,7 @@
         "skipLibCheck": true,
         "sourceMap": true,
         "strict": true,
-        "target": "es2019",
+        "target": "es2021",
         "baseUrl": "./",
         "paths": {
             "mathjax-full": ["types/mathjax-full"]