babel-preset-power-assert Cannot find module 'power-assert'

README.md does not say requires installing power-assert, but I encountered the error: Cannot find module 'power-assert'. Do I need to install power-assert also?

# I have installed `babel-cli` to global before in order to try small things.
> npm i -g node-cli

# Now I have installed `babel-preset-power-assert` to use it in the test of this module.
> npm i -D babel-register babel-preset-power-assert

# I tried a small experiment with `babel-node` in global.
> babel-node --presets power-assert try.js
module.js:440
    throw err;
    ^

Error: Cannot find module 'power-assert'
    at Function.Module._resolveFilename (module.js:438:15)
    at Function.Module._load (module.js:386:25)
    at Module.require (module.js:466:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (try.js:12:16)
    at Module._compile (module.js:541:32)
    at loader (C:\Users\t-nagashima.AD\nodist\bin\node_modules\babel-cli\node_modules\babel-register\lib\node.js:158:5)
    at Object.require.extensions.(anonymous function) [as .js] (C:\Users\t-nagashima.AD\nodist\bin\node_modules\babel-cli\node_modules\babel-register\lib\node.js:168:7)
    at Module.load (module.js:456:32)
    at tryModuleLoad (module.js:415:12)

Node 6.1.0
npm 3.7.5

May 12 '16 02:05 mysticatea

Ah, so sorry. That's a problem. I'll add power-assert as peerDependencies to here and babel-plugin-empower-assert.

And update README too.

Thanks.

May 12 '16 02:05 twada

I got it. Thank you.

FYI: I have not seen PEER_INVALID warning here. :D

> npm i -D babel-register babel-preset-power-assert

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May 12 '16 02:05 mysticatea

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Cannot find module 'power-assert'

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