Drop upper constraint on glue version

[kyleam]

pmparams 0.2.1 put an upper constraint on the glue version in d76347f (CI and description changes, 2024-10-23):

pmparams/DESCRIPTION

Line 37 in b718300

glue (< 1.8.0),

That constraint should be dropped because it indefinitely blocks the upgrade path for glue.

For example, consider the next MPN snapshot [*]. The target state would be

1. pmparams at its latest version

2. pmtables at its latest version. That'd be at least 0.8.1, which notably is compatible with glue 1.8.0.

3. glue at its latest version

However, as long as pmparams declares that it's not compatible with glue 1.8.0, 3 cannot be satisfied, and glue must remain pinned at an earlier version.

[*] This issue is not yet relevant for the next snapshot because the glue 1.8.0 update is already held back from that snapshot for other reasons. It'd be nice to release a fixed version within the next few weeks though.

cc: @barrettk @graceannobrien