Bump lower version bounds on aeson to >= 1

Commit f494ba2 introduces the use of
`Data.Aeson.Text`, a module that was first introduced in `aeson-1.0.0.0` Let's
make sure the lower version bounds on `aeson` respect this.

Fixes #233.

criterion.cabal

@@ -79,7 +79,7 @@ library
     Paths_criterion
 
   build-depends:
-    aeson >= 0.8,
+    aeson >= 1,
     ansi-wl-pprint >= 0.6.7.2,
     base >= 4.5 && < 5,
     base-compat-batteries >= 0.10 && < 0.12,