Do not normalize cidr

- Fix sindresorhus#48

index.js

@@ -1,13 +1,13 @@
 import {networkInterfaces} from 'node:os';
 import {gateway4async, gateway4sync, gateway6async, gateway6sync} from 'default-gateway';
-import {contains, normalize} from 'cidr-tools';
+import {contains} from 'cidr-tools';
 
 function findIp({gateway}) {
 	// Look for the matching interface in all local interfaces
 	for (const addresses of Object.values(networkInterfaces())) {
 		for (const {cidr} of addresses) {
 			if (contains(cidr, gateway)) {
-				return normalize(cidr).split('/')[0];
+				return cidr.split('/')[0];
 			}
 		}
 	}