core: add lower bound to base64-bytestring

Related to #175

Author: sorki

hnix-store-core/hnix-store-core.cabal

@@ -80,7 +80,7 @@ library
     , attoparsec
     , algebraic-graphs >= 0.5 && < 0.8
     , base16-bytestring >= 1.0
-    , base64-bytestring
+    , base64-bytestring >= 1.2.1
     , bytestring
     , case-insensitive
     , cereal