Updated change log.

Merge pull request PHPOffice#605 from PHPOffice/hotfix-0.12.1

Hotfix 0.12.1

Merge pull request PHPOffice#460 from PHPOffice/develop

v0.12.0

Bugfix for PHPOffice#257: HTML Reader: `<p>` and header tags puts no …

…output

Merge pull request PHPOffice#256 from PHPOffice/develop

PR 0.11.0

Merge pull request PHPOffice#247 from ivanlanin/master

PR 0.10.1

Merge pull request PHPOffice#218 from PHPOffice/develop

PR Version 0.10

Fix psr-4 base dir in composer.json

Merge pull request PHPOffice#177 from PHPOffice/develop

Version 0.9.0

Added test case for image type detection

Conflicts:
	changelog.txt