Merge pull request omise#362 from omise/release-v5.0.0

Release v5.0.0

Release v4.29.0 (omise#352)

* dump v4.29.0

* update changelog in readme

Preparing release v4.28.1 (omise#345)

* Preparing release v4.28.1

* Fixed the wrong version in CHANGELOG.

* Added new line between changelog and version number in readme.txt.

Preparing release 4.28.0. (omise#343)

Preparing release of v4.27.0 (omise#332)

Preparing release of v4.26.0 (omise#325)

* Preparing release of v4.26.0

* Updated the release date to Nov 2.

Preparing the release of v4.25.0 (omise#320)

Releasing 4.24.2 (omise#314)

Preparing the release of v4.24.1 (omise#312)

Preparing the release of v4.24.0 (omise#307)

* Preparing the release of v4.24.0

* Fixed typo

* Fixed typo

* Updated the chagnelog and readme.txt.