constrain pantry to prevent build failures

--- a/stack.cabal
+++ b/stack.cabal
@@ -279,7 +279,7 @@ library
         network-uri >=2.6.4.1,
         open-browser >=0.2.1.0,
         optparse-applicative >=0.14.3.0,
-        pantry >=0.5.3,
+        pantry >=0.5.3 && <0.6.0,
         path >=0.7.0,
         path-io >=1.6.3,
         persistent >=2.11.0.4 && <2.14.0.0,
@@ -405,7 +405,7 @@ executable stack
         network-uri >=2.6.4.1,
         open-browser >=0.2.1.0,
         optparse-applicative >=0.14.3.0,
-        pantry >=0.5.3,
+        pantry >=0.5.3 && <0.6.0,
         path >=0.7.0,
         path-io >=1.6.3,
         persistent >=2.11.0.4 && <2.14.0.0,
@@ -535,7 +535,7 @@ executable stack-integration-test
         open-browser >=0.2.1.0,
         optparse-applicative >=0.14.3.0,
         optparse-generic >=1.3.1,
-        pantry >=0.5.3,
+        pantry >=0.5.3 && <0.6.0,
         path >=0.7.0,
         path-io >=1.6.3,
         persistent >=2.11.0.4 && <2.14.0.0,
@@ -670,7 +670,7 @@ test-suite stack-test
         network-uri >=2.6.4.1,
         open-browser >=0.2.1.0,
         optparse-applicative >=0.14.3.0,
-        pantry >=0.5.3,
+        pantry >=0.5.3 && <0.6.0,
         path >=0.7.0,
         path-io >=1.6.3,
         persistent >=2.11.0.4 && <2.14.0.0,