isGlob('?') returns false

[felix9]

This seems wrong to me?

In particular, it's causing fastGlob("?/*") to fail.

mkdir a
touch a/test
node -p 'require("fast-glob").sync("?/test")'
# prints []
node -p 'require("fast-glob").sync("{?,?}/test")'
# prints [ 'a/test' ]