fix: add empty file to all packages to force a release

The last release was invalid because I added dist to .gitignore without
thinking through all the ramifications. That _should_ be fixed now, but
I need some way to induce a release.

By adding an empty file, multi-semantic-release should run for every
package and by making this commit a "fix", each package should release
with the minimum bump allowed (typically patch releases, but due to
depenencies, some may be minors).

Once all are released, I can remove the files using a "chore" commit.

Author: ianwremmel