fix: remove unessessary executable bits

[donatj]

I was doing a security scan which included our dependencies and I found that your readme.md file had it's executable bit set in our node_modules folder.

After forking, a quick scan found these non-scripts set executable

$ find . -type f -exec test -x {} \; -print | grep -v '/\.git/'
./.editorconfig
./readme.md

I removed the executable bit from all these as they don't need it.