set lib to es2020

Author: iOvergaard

tsconfig.json

@@ -4,7 +4,7 @@
     "target": "esnext",
     "module": "esnext",
     "noEmitOnError": true,
-    "lib": ["es2017", "dom", "dom.iterable"],
+    "lib": ["es2020", "dom", "dom.iterable"],
     "esModuleInterop": false,
     "declaration": true,
     "emitDeclarationOnly": true,