is-callable dependency missing from package.json

[David Halls]

Latest code (after git clone and npm install in the directory)

> require('array.from')
Error: Cannot find module 'is-callable'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/tmp/node_modules/array.from/implementation.js:7:18)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Module.require (module.js:353:17)

[Jordan Harband]

Thanks - this is in unreleased code (added in #35). Will fix in master.

(In general, master is unstable, and code should only be consumed from npm, not from git)