remove package

packages/browser-sync/lib/async.js

@@ -225,6 +225,9 @@ module.exports = {
             var localTunnel = require("./tunnel");
             localTunnel(bs, function(err, tunnel) {
                 if (err) {
+                    if (err.code === "MODULE_NOT_FOUND") {
+                        return utils.fail(true, err, bs.cb);
+                    }
                     return done(err);
                 } else {
                     return done(null, {

packages/browser-sync/lib/tunnel.js

@@ -8,6 +8,17 @@ var utils = require("util");
  * @param {Function} cb
  */
 module.exports = function(bs, cb) {
+    var localtunnel;
+    try {
+        localtunnel = require("localtunnel");
+    } catch (e) {
+        if (e.code === "MODULE_NOT_FOUND") {
+            var error = new Error("Could not find package `localtunnel`. From Browsersync version 3.0 you'll need to install this manually.");
+            error.code = e.code;
+            return cb(error);
+        }
+        return cb(e);
+    }
     var opts = {};
     var options = bs.options;
     var port = options.get("port");
@@ -22,7 +33,7 @@ module.exports = function(bs, cb) {
         utils.inspect(opts)
     );
 
-    require("localtunnel")(port, opts, function(err, tunnel) {
+    localtunnel(port, opts, function(err, tunnel) {
         if (err) {
             return cb(err);
         }

packages/browser-sync/package.json

@@ -85,14 +85,6 @@
 		"typescript": "^4.6.2",
 		"vinyl": "1.2.0"
 	},
-	"optionalDependencies": {
-		"localtunnel": "^2.0.2"
-	},
-	"peerDependenciesMeta": {
-		"localtunnel": {
-			"optional": true
-		}
-	},
 	"keywords": [
 		"browser sync",
 		"css",