[Chore] Update dependency wd to version 0.4.0

[SebastienElet]

This Pull Request update dependency wd from version ^0.2.21 to 0.4.0

Changelog

0.4.0 / 2015-11-02

• 0.4.0
• Merge pull request #411 from imurchie/isaac-performtouch
  Wrap touch action array in object
• Wrap touch action array in object
• Update jsonWire doc about scroll command
• Merge pull request #396 from bronzehedwick/patch-1
  Fix broken link to mobile emulator docs
• Fix broken link to mobile emulator docs
• cleaning up makefiles, configuring colored mocha

0.3.12 / 2015-05-28

• relase notes update [ci skip]
• 0.3.12
• skipping chrome failing test
• test fix
• lodash upgrade fixes
• travis config fix
• packages upgrade and related fixes
• removing eol whitespaces
• fixed geolocation
• Merge pull request #393 from pdehaan/patch-1
  Update license attribute
• Update license attribute
  specifying the type and URL is deprecated:
  https://docs.npmjs.com/files/package.json#license
  http://npm1k.org/
• Update README.md
• Merge pull request #342 from Jonahss/master
  added user-agent string to requests
• Merge pull request #374 from bcherny/master
  add info about selenium server to docs
• Merge pull request #378 from kevlened/patch-1
  Update the version of Q
• Merge pull request #384 from iammerrick/patch-1
  Documentation fix.
• Documentation fix.
• Update the version of Q
  Updating the version of Q allows long stack traces which makes it much easier to debug tests.
• add info about selenium server to docs
• Updated relase notes [ci skip]

0.3.11 / 2014-11-13

• 0.3.11
• Merge pull request #360 from apendua/retry-on-epipe
  Also retry on EPIPE ...
• also retry on EPIPE

0.3.10 / 2014-10-25

• Update release-notes.md
• 0.3.10
• package update
• added wd-no-default cap

0.3.9 / 2014-10-10

• 0.3.9
• packages + test update
• package update
• fixing ci
• ci: enabling mobile
• 0.3.8
• release note update

0.3.8 / 2014-09-18

• package upgrade
• Merge pull request #343 from karlwestin/feature-chain-tap
  Promise WebDriver: make "tap" chainable
• Merge pull request #344 from liamcmitchell/fix-keywords
  Fix/add package.json keywords for discoverability
• Merge pull request #345 from 0x1mason/unlockDevice
  Added unlock methods
• Added unlock methods
• Fix/add package.json keywords for discoverability
  Might help others find this project quicker, for a long time I thought the only two options were selenium-webdriver and webdriverio.
• Promise WebDriver: make "tap" chainable