ksh ~(N) null glob pattern prefix causes error SC1036

[Richard Taityr]

please support ksh ~(N) pattern prefix which is similar to the nullglob option in bash

• My shellcheck version (shellcheck --version or "online"): 0.9.0
• The rule's wiki page does not already cover this (e.g. https://shellcheck.net/wiki/SC2086)
• I tried on https://www.shellcheck.net/ and verified that this is still a problem on the latest commit
• I searched through https://github.com/koalaman/shellcheck/issues and didn't find anything related