Update for release v2.5.0

Update from 2.3 to 2.4 (wp-cli#393)

Update from 2.3 to 2.4

Update to v2.3.0

Merge pull request wp-cli#298 from wp-cli/add_audio_video_behat_data

Add audio/video test data for media regenerate.

Swap out the favicon

Merge pull request wp-cli#290 from wp-cli/2-link

Link to Governance in the footer

Merge pull request wp-cli#274 from wp-cli/regenerate-1-1-0

Regenerate command docs for v1.1.0

Update current version

Merge pull request wp-cli#234 from wp-cli/release-0-25-0

Release v0.25.0