Cabal revisions of http2-5.2.1

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 cabal-version:      >=1.10 name:               http2 version:            5.2.1+x-revision: 1 license:            BSD3 license-file:       LICENSE maintainer:         Kazu Yamamoto <kazu@iij.ad.jp>         bytestring >=0.10,         case-insensitive >=1.2 && <1.3,         containers >=0.6 && <0.7,-        http-semantics,+        http-semantics <0.0.1,         http-types >=0.12 && <0.13,         network >=3.1,         network-byte-order >=0.1.7 && <0.2,