feat(day_1): both exercises done

src/main.ts

@@ -1,17 +1,17 @@
-async function main(): Promise<number> {
-	const args = Deno.args;
-	if (!args || args.length !== 1) {
-		return Promise.resolve(-1);
-	}
-	const day = parseInt(args[0]);
-
-	const module = await import(`./exercises/day_${day}.ts`);
-	module.default();
-
-	return Promise.resolve(0);
-}
-
 // Learn more at https://docs.deno.com/runtime/manual/examples/module_metadata#concepts
 if (import.meta.main) {
-	await main();
+  await main();
+}
+
+async function main(): Promise<number> {
+  const args = globalThis.Deno.args;
+  if (!args || args.length !== 1) {
+    return Promise.resolve(-1);
+  }
+  const day = parseInt(args[0]);
+
+  const module = await import(`./exercises/day_${day}.ts`);
+  await module.default();
+
+  return Promise.resolve(0);
 }