Dependency version constraints

[defanor]

There is this base < 4.15 constraint, which prevents building with the current GHC (and base package) versions from Debian stable (GHC 9.0.2, base 4.15.1.0), but apparently it can be relaxed, and the package builds fine then. Maybe it can be relaxed even further at once, and along with semigroups (builds fine with 0.20) and unix-bytestring (builds fine with 0.4.0), since those constraints lead to potential unnecessary incompatibilities, too.

[chris-martin]

base 4.16 to 4.18 (GHC 9.2 to 9.6) are now supported in the latest release.

[defanor]

It is quite a leap; now it is not usable with GHC and base from Debian stable repositories because the range is above the available version, instead of being below.

[chris-martin]

Made metadata revisions to 1.4.5:

• bump the base upper bound to < 4.17
• semigroups to < 0.21
• unix-bytestring to < 0.5

[defanor]

Thanks!