Upgrade UninstallPKG to 1.0.7
Add depends_on and caveats clauses for onyx

Add MacOS version dependencies in the style of #7760.
Also add caveat for OS 10.4-5 as in the casks for Deeper
and Maintenance.
update Factor to 0.97.
Merge pull request #7781 from mrjbq7/factor

Update Factor to 0.97.
Update stellarium to 0.13.1
Merge pull request #7783 from tjwallace/master

Update stellarium to 0.13.1
Update torbrowser to 4.0.2
Merge pull request #7784 from claui/torbrowser

Update torbrowser to 4.0.2
Merge pull request #7782 from jawshooah/onyx-depends-caveats

Add depends_on and caveats clauses for onyx
Merge pull request #7780 from invl/uninstallpkg

Upgrade UninstallPKG to 1.0.7