Fixing build issues

Author: RinkeHoekstra

tsconfig.json

@@ -4,12 +4,14 @@
 		"target": "es6",
 		"outDir": "out",
 		"lib": [
-			"es6", "dom"
+			"es2020", "dom"
 		],
+		"types": ["node"],
 		"sourceMap": true,
 		"rootDir": "src",
 		// "esModuleInterop": true,
-		"strict": true   /* enable all strict type-checking options */
+		"strict": true,   /* enable all strict type-checking options */
+		"skipLibCheck": true,
 		/* Additional Checks */
 		// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
 		// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */