Keep bound on `hOpenPGP` (#5175, #4995)
Keep bound on `hOpenPGP` (#5175, #4995)

michalkonecny/stackage,soenkehahn/stackage,fpco/stackage,stackbuilders/stackage,iand675/stackage,Daniel-Diaz/stackage,simonmichael/stackage,jonschoning/stackage,massysett/stackage,athanclark/stackage,clinty/stackage,asr/stackage,mrkkrp/stackage