Add release date to change log

Bump version to 0.104.8 and update change log

Bump version to 0.104.7 and update change log

Bump version to 0.104.6 and update change log

Bump version to 0.104.5 and update change log

Bump version to 0.104.4 and update change log

Bump version to 0.104.3 and update change log

Fix core tests

dotfile: fix template

Update dotspacemacs/config and dotspacemacs/init occurrences