tahoe-directory has a release now, bound the dependency

gbs-downloader.cabal

@@ -116,7 +116,7 @@ library
     , servant-client           >=0.16.0.1 && <0.21
     , servant-client-core      >=0.16     && <0.21
     , tahoe-chk                >=0.1      && <0.2
-    , tahoe-directory
+    , tahoe-directory          >=0.1      && <0.2
     , tahoe-great-black-swamp  >=0.3      && <0.4
     , tahoe-ssk                >=0.2      && <0.3
     , text                     >=1.2.3.1  && <1.3