Missing support for GHC 8.4.2

[asr]

Using GHC 8.4.2 I get the following error:

$ cabal install
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: online-atps-0.1.1 (user goal)
[__1] next goal: base (dependency of online-atps)
[__1] rejecting: base-4.11.1.0/installed-4.1... (conflict: online-atps =>
base>=4.6.0.1 && <4.11)
[__1] rejecting: base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0,
base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2,
base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0,
base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0,
base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0,
base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires
installed instance)
[__1] fail (backjumping, conflict set: base, online-atps)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, online-atps