Update docs: inputToken --> token

[gavares]

git clone from master and then run npm test gives error:

/tmp/winston-loggly/lib/winston-loggly.js:36
    throw new Error('Loggly Customer token is required.');

Changing config option inputToken: myToken to token: myToken and the tests pass.

[adamhadani]

👍
I could reproduce, and changing as mentioned above fixed it for me.
One test still fails though which I suspect is unrelated:

  An instance of the Loggly Transport when passed an input token the log() method when passed circular metadata
    ✗ should log messages to loggly
        » expected null, got undefined // winston-loggly-test.js:46

[indexzero]

Could you rephrase your comment in the form of a pull-request?

[adamhadani]

@indexzero opened PR #32