cabal-install.cabal: allow tar-0.7

Author: juhp

cabal-install/cabal-install.cabal

@@ -250,7 +250,7 @@ library
       , process    >= 1.2.3.0  && < 1.7
       , random     >= 1.2      && < 1.4
       , stm        >= 2.0      && < 2.6
-      , tar        >= 0.5.0.3  && < 0.7
+      , tar        >= 0.5.0.3  && < 0.8
       , time       >= 1.5.0.1  && < 1.16
       , zlib       >= 0.5.3    && < 0.8
       , hackage-security >= 0.6.2.0 && < 0.7