Relax glib constraints for [BlueZ]

[bramtayl]

configure only seems to be checking if glib is greater than or equal to 2.28

[giordano]

Besides the fact this doesn't work, it doesn't do what you think

[bramtayl]

Ok, so here's what I was thinking. The docs say:

The optional keyword argument compat can be used to specify a string for use in the Project.toml of the generated Julia package.

and if 2.28 appeared in the [compat] section of a Project.toml it would make the package work with any versions within [2.28.0, 3.0.0)

[giordano]

You're assuming that this change would have effect in the registry, but it won't.

[giordano]

Also, the fact that tests in #3033 are running (and passing) shows that this change wasn't even needed

[bramtayl]

Yay!