how to see files which start with dot in finder?

Any developer will have a lot of files which start with dot. E.g. .travis.yml, .my.conf etc.

While its possible to see these in terminal (e.g. ls -al), they are "invisible" in the finder. When you need to drop the file into an attachment in email for example, you cant as finder cant see them.

I tried this solution:

defaults write com.apple.finder AppleShowAllFiles TRUE

killall Finder

But this has no effect. Presumably, this fix is not working on recent MacOS versions, or possibly it doesnt work for files starting with dot.

Basically, I always want finder to show all files, especially those starting with dot (directories or files).

NOTE: I would not consider installing one of the 3rd party "hack" apps which allow you to tinker with settings as its too much of a risk in terms of malware/viruses, but I don't mind hacking the underlying Unix itself if it results in a solution.