Updated html5shiv to 3.7.2
Merge pull request #259 from GrahamCampbell/2.0-html5shiv

[2.0] Updated html5shiv to 3.7.2
Prepare release
Updated the phpunit dev version constraint
Merge pull request #270 from GrahamCampbell/patch-1

[2.0] Updated the phpunit dev version constraint
Loosen version constraints
Merge pull request #271 from GrahamCampbell/patch-1

Loosen version constraints
Bump dependency
Prepare release
Update CONTRIBUTING.md
Merge pull request #273 from GrahamCampbell/patch-1

Update CONTRIBUTING.md
Merge branch '2.0'
Fix