update dependencies, fix lint, require node 8

.travis.yml

@@ -1,5 +1,4 @@
 language: node_js
 node_js:
   - '8'
-  - '6'
-  - '4'
+  - '10'

browser.js

@@ -8,11 +8,9 @@ const URL = require('url-parse');
 module.exports = hosts => {
 	return pAny(arrify(hosts).map(url => {
 		return new Promise(resolve => {
-			url = new URL(prependHttp(url));
-
-			const hostname = url.hostname;
-			const protocol = url.protocol || '';
-			const port = url.port ? `:${url.port}` : '';
+			let {hostname, protocol, port} = new URL(prependHttp(url));
+			protocol = protocol || '';
+			port = port ? `:${port}` : '';
 
 			const img = new Image();
 			img.addEventListener('load', () => resolve(true));

index.js

@@ -12,14 +12,20 @@ const prependHttp = require('prepend-http');
 const routerIps = require('router-ips');
 const URL = require('url-parse');
 
-const checkRedirection = target => {
-	return got(target, {rejectUnauthorized: false}).then(res => {
-		const url = new URL(res.headers.location || 'x://x');
-		return !routerIps.has(url.hostname);
-	}).catch(() => false);
+const checkRedirection = async target => {
+	let res;
+
+	try {
+		res = await got(target, {rejectUnauthorized: false});
+	} catch (error) {
+		return false;
+	}
+
+	const url = new URL(res.headers.location || 'x://x');
+	return !routerIps.has(url.hostname);
 };
 
-function isTargetReachable(target) {
+async function isTargetReachable(target) {
 	const url = new URL(prependHttp(target));
 	url.port = Number(url.port) || portNumbers.getPort(url.protocol.slice(0, -1)).port || 80;
 
@@ -28,17 +34,22 @@ function isTargetReachable(target) {
 		url.protocol = ((service && service.name) ? service.name : 'unknown') + ':';
 	}
 
-	return getAddress(url.hostname).then(address => {
-		if (!address || routerIps.has(address)) {
-			return false;
-		}
+	let address;
+	try {
+		address = await getAddress(url.hostname);
+	} catch (error) {
+		return false;
+	}
 
-		if (url.protocol === 'http:' || url.protocol === 'https:') {
-			return checkRedirection(url.toString());
-		}
+	if (!address || routerIps.has(address)) {
+		return false;
+	}
+
+	if (url.protocol === 'http:' || url.protocol === 'https:') {
+		return checkRedirection(url.toString());
+	}
 
-		return isPortReachable(url.port, {host: address});
-	}).catch(() => false);
+	return isPortReachable(url.port, {host: address});
 }
 
 function getAddress(hostname) {

package.json

@@ -13,7 +13,7 @@
 		"silverwind <me@silverwind.io> (github.com/silverwind)"
 	],
 	"engines": {
-		"node": ">=4"
+		"node": ">=8"
 	},
 	"scripts": {
 		"test": "xo && ava test.js"
@@ -42,15 +42,15 @@
 	],
 	"dependencies": {
 		"arrify": "^1.0.1",
-		"got": "^8.0.3",
+		"got": "^9.3.2",
 		"is-port-reachable": "^2.0.0",
 		"p-any": "^1.1.0",
 		"p-timeout": "^2.0.1",
-		"pify": "^3.0.0",
-		"port-numbers": "^2.0.20",
+		"pify": "^4.0.1",
+		"port-numbers": "^4.0.4",
 		"prepend-http": "^2.0.0",
 		"router-ips": "^1.0.0",
-		"url-parse": "^1.2.0"
+		"url-parse": "^1.4.4"
 	},
 	"devDependencies": {
 		"ava": "*",