Can't run spectral 4.1.0 when installed via npm

[johlo]

Describe the bug
I installed spectral 4.1.0 via npm, when running the spectral command it errors out.
When I install 4.0.3 via npm the command works.

To Reproduce

1. $ npm install -g @stoplight/spectral
2. $ spectral
   This gives an error:

internal/modules/cjs/loader.js:775
    throw err;
    ^

Error: Cannot find module 'tslib'
Require stack:
- /usr/local/lib/node_modules/@stoplight/spectral/dist/cli/commands/lint.js
- /usr/local/lib/node_modules/@stoplight/spectral/dist/cli/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:772:15)
    at Function.Module._load (internal/modules/cjs/loader.js:677:27)
    at Module.require (internal/modules/cjs/loader.js:830:19)
    at require (internal/modules/cjs/helpers.js:68:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/@stoplight/spectral/dist/cli/commands/lint.js:3:17)
    at Module._compile (internal/modules/cjs/loader.js:936:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:947:10)
    at Module.load (internal/modules/cjs/loader.js:790:32)
    at Function.Module._load (internal/modules/cjs/loader.js:703:12)
    at Module.require (internal/modules/cjs/loader.js:830:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/usr/local/lib/node_modules/@stoplight/spectral/dist/cli/commands/lint.js',
    '/usr/local/lib/node_modules/@stoplight/spectral/dist/cli/index.js'
  ]
}

Expected behavior
No error when running

Environment (remove any that are not applicable):

• Library version: 4.1.0
• OS: mac os 10.13.5
• npm: 6.11.13

Additional context
FYI, I also tried to installed the binary by running the curl from your install instructions, but that doesn't work:

$ curl -L https://raw.githack.com/stoplightio/spectral/master/install.sh
404: Not Found

[P0lip]

@johlo
I'm sorry to hear you are having troubles with latest Spectral 4.1.
I can confirm it run fine under Node 12, but 10 version is in fact broken, so a fix is certainly needed.
In the meantime, you can switch over to Node 12 if you have such a possibility.
EDIT:
@XVincentX tried it out under Node 12 and it does not work for him either. I must have tslib somewhere in node_modules, therefore it works for me.

You can also try using the compiled binaries that can be found over here https://github.com/stoplightio/spectral/releases/tag/v4.1.0.
My apologies for any inconvenience caused.

[P0lip]

@johlo
4.1.1 containing the fix has been released.
Let me know if you face any troubles.

[johlo]

Works now, thanks!

[philsturgeon]

Also the installer script 404 was due to the docs not being published after we merged v4.1.0 changes into master. The docs have been updated now, and soon they'll be auto-publishing so we don't have to remember.