Update tsconfig.json

tsconfig.json

 {
   "compilerOptions": {
-    /* Basic Options */
-    "target": "es2017",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "declaration": true,                      /* Generates corresponding '.d.ts' file. */
-    "outDir": "./built/",                     /* Redirect output structure to the directory. */
-    "rootDir": "./src/",                      /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
-    "removeComments": true,                   /* Do not emit comments to output. */
-
-    /* Strict Type-Checking Options */
-    "strict": true,                           /* Enable all strict type-checking options. */
-    "strictFunctionTypes": true,              /* Enable strict checking of function types. */
-
-    /* Additional Checks */
-    "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
-
-    /* Module Resolution Options */
-    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "target": "es2020",
+    "module": "commonjs",
+    "declaration": true,
+    "outDir": "./built/",
+    "removeComments": true,
+    "strict": true,
+    "strictFunctionTypes": true,
+    "strictNullChecks": true,
+    "experimentalDecorators": true,
+    "noImplicitReturns": true,
+    "esModuleInterop": true,
   },
   "include": [
     "src/**/*",
   ],
   "exclude": [
-      "node_modules",
-      "test/**/*",
+    "node_modules",
+    "test/**/*",
   ]
 }