Hackage release 1.4.0.2

v1.4.0.2

Updated build matrix. Added Hackage badge. Bumped version to 1.4.0.2.

Hackage release 1.4.0.1

v1.4.0.1

Bumped version number to 1.4.0.1.

Hackage release 1.4.0.0

v1.4.0.0

Relaxed build dependencies a bit.