allow crypton-connection-0.4 (#75)

Author: Miezhiko

calamity/calamity.cabal

@@ -193,7 +193,7 @@ library
     , colour                >=2.3.5   && <2.4
     , concurrent-extra      >=0.7     && <0.8
     , containers            >=0.6     && <0.8
-    , crypton-connection    >=0.2.6   && <0.4
+    , crypton-connection    >=0.2.6   && <0.5
     , crypton-x509-system   >=1.6.6   && <1.7
     , data-default-class    >=0.1     && <0.2
     , data-flags            >=0.0.3   && <0.1