I just found a duplicate of what I see happening at stack overflow,
The answer seems to mirror exactly what I am saying but the poster didn’t respond if it worked or if they found a solution elsewhere.
I am asking rather than experimenting because I don’t want to fry the wiki by doing something stupid as I have never messed with the config before. I understand how its setup, just not the consequences of changes I may make.
Edit: From the travis docs,
Note that safelisting also prevents tagged commits from being built. If you consistently tag your builds in the format v1.3 you can safelist them all with regular expressions, for example /^v\d+.\d+(.\d+)?(-\S*)?$/.
If you use both a safelist and a blocklist, the safelist takes precedence.
By default, the gh-pages branch is not built unless you add it to the safelist.
This is why I am thinking there may be a difference.