Release version 1.15

[jdevalk]

Release version 1.15

• Check out develop.
• Update the changelog in readme.txt with the relevant entries, you should be able to find them based on the pull requests in this release's milestone.
• Update README.md if needed, for instance for new features.
• Merge develop into master.
• Set the version using grunt set-version --new-version=1.15 (e.g., grunt set-version --new-version=1.1.0) & grunt update-version.
• Commit & push the changes: git commit -m "Updating version to 1.15" && git push.
• Make the tag, e.g. git tag -a 1.15.0 -m "1.15.0".
• Push the tag: git push --tags.
• Run grunt artifact - this will create yoast-test-helper.zip.
• Test the zip locally.
• Run grunt wp_deploy:master to release the plugin to WordPress.org.
• Create a GitHub release, paste the changelog to the notes and attach the zip.
• Create a new milestone for the next release.
• Merge master back to develop.

[jdevalk]

Done.