Bump Alex version post release

Perhaps the next release would be a 3.3 not 3.2.7, but doing the minimal bump for now. This is enough to make it easier to keep releases vs master straight, and that's what matters for now.

Author: Ericson2314

alex.cabal

@@ -1,6 +1,6 @@
 cabal-version: >= 1.10
 name: alex
-version: 3.2.6
+version: 3.2.7
 -- don't forget updating changelog.md!
 license: BSD3
 license-file: LICENSE