Cabal revisions of persistent-2.8.1

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

 name:            persistent version:         2.8.1+x-revision: 1 license:         MIT license-file:    LICENSE author:          Michael Snoyman <michael@snoyman.com>     if flag(nooverlap)         cpp-options: -DNO_OVERLAP -    build-depends:   base                     >= 4.7       && < 5+    build-depends:   base                     >= 4.7       && < 4.13                    , bytestring               >= 0.9                    , transformers             >= 0.2.1                    , time                     >= 1.1.4     type:          exitcode-stdio-1.0     main-is:       test/main.hs -    build-depends:   base >= 4.8 && < 5+    build-depends:   base >= 4.8 && < 4.13                    , hspec >= 1.3                    , containers                    , text

 name:            persistent version:         2.8.1-x-revision: 1+x-revision: 2 license:         MIT license-file:    LICENSE author:          Michael Snoyman <michael@snoyman.com>     description: test out our assumption that OverlappingInstances is just for String  library+    build-depends: aeson <1.6+     if flag(nooverlap)         cpp-options: -DNO_OVERLAP