Remove opn which is deprecated (#44)

use open instead

Author: jamesgeorge007

packages/cli/package.json

@@ -41,7 +41,7 @@
     "lodash": "^4.17.5",
     "lz-string": "^1.4.4",
     "ms": "^2.0.0",
-    "opn": "^5.1.0",
+    "open": "^6.3.0",
     "ora": "^1.3.0",
     "pacote": "^2.7.36",
     "shortid": "^2.2.8",
@@ -58,7 +58,7 @@
     "@types/lz-string": "^1.3.32",
     "@types/ms": "^0.7.29",
     "@types/node": "^8.0.1",
-    "@types/opn": "^3.0.28",
+    "@types/open": "^6.1.0",
     "@types/ora": "^0.3.31",
     "@types/shortid": "^0.0.29",
     "@types/update-notifier": "^1.0.1",

packages/cli/src/commands/login.ts

@@ -1,7 +1,7 @@
 import * as http from "http";
 import * as inquirer from "inquirer";
 import { omit } from "lodash";
-import * as opn from "opn";
+import * as open from "open";
 import ora = require("ora");
 
 import * as cfg from "../cfg";
@@ -23,7 +23,7 @@ import * as Commander from "commander";
 async function handleSignIn() {
   // Open specific url
   info(`Opening ${CLI_LOGIN_URL}`);
-  opn(CLI_LOGIN_URL, { wait: false });
+  open(CLI_LOGIN_URL, { wait: false });
 
   const { authToken } = await inquirer.prompt([
     {