Allow swagger2-2.3

Author: fizruk

servant-swagger.cabal

@@ -1,6 +1,6 @@
 name:                servant-swagger
 version:             1.1.5
-x-revision:          4
+x-revision:          5
 synopsis:            Generate Swagger specification for your servant API.
 description:
   Swagger is a project used to describe and document RESTful APIs.
@@ -81,7 +81,7 @@ library
                      , lens                      >=4.7.0.1  && <4.18
                      , servant                   >=0.13     && <0.15
                      , singleton-bool            >=0.1.3    && <0.2
-                     , swagger2                  >=2.1      && <2.3
+                     , swagger2                  >=2.1      && <2.4
                      , text                      >=1.2.0.6  && <1.3
                      , unordered-containers      >=0.2.5.1  && <0.3