Plugin installation process dies when one of the plugins is blocked on your OS

• I am on the latest Hyper.app version
• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: Windows 10 1703
• Hyper.app version: 1.4.6
• Link of a Gist with the contents of your .hyper.js:
• Relevant information from devtools (CMD+ALT+I on Mac OS, CTRL+SHIFT+I elsewhere):
• The issue is reproducible in vanilla Hyper.app:

Issue

plugins: [
    "hyper-snazzy",
    "hyper-statusline",
    "hypercwd"
  ],

So in this example here, hyper-statusline has blocked installation on win32 via

 "os": [
    "!win32"
  ],

Hyper will try to install it and fail, but since hypercwd comes after hyper-statusline in the plugins array, installation of it will not be triggered at all.

There also should be some sort of alert/warning when a plugin can't be installed because it is blocked.

Start with the plugin installation flow and the .hyper.js plugins configuration described in the issue, then reproduce the failure on Windows with a plugin whose package metadata blocks win32. Done means installation continues to later plugins and presents a warning when a plugin is blocked by the operating system.