Commit a2c64492b9ebf3bf645e670c2df5fea08e266bcb

hsdns.cabal: updated dependency specification to make Hackage happy

Apparently, Hackage wants to see an upper version bound for the dependency on
the base package. I'm not sure I like that idea, but it's probably not a big
deal.
hsdns.cabal
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1010Synopsis: Asynchronous DNS Resolver
1111Description: Asynchronous DNS Resolver; requires GNU ADNS to be installed.
1212Category: Foreign, Network
13Build-Depends: base, network, containers
13Build-Depends: base >=3.0.0.0 && <4.2.0.0, network, containers
1414Extensions: ForeignFunctionInterface, EmptyDataDecls
1515Extra-Libraries: adns
1616Includes: "adns.h", "errno.h"