re-enable hledger packages, take 3 (#4132)

build-constraints.yaml

@@ -1075,11 +1075,11 @@ packages:
         # be removed, rather than putting an upper bound on hledger-lib and hledger.
         # (https://github.com/fpco/stackage/issues/3494)
         #
-        - hledger-lib < 0
-        - hledger < 0
-        - hledger-ui < 0
-        - hledger-web < 0
-        - hledger-api < 0
+        - hledger-lib
+        - hledger
+        - hledger-ui
+        - hledger-web
+        - hledger-api
         #
         - quickbench
         - regex-compat-tdfa
@@ -2304,7 +2304,7 @@ packages:
         - flexible-defaults
         - funcmp
         - hackage-db
-        - hledger-interest < 0
+        - hledger-interest
         - hopenssl
         - hsdns
         - hsemail
@@ -3114,7 +3114,7 @@ packages:
         - massiv-io
 
     "Hans-Peter Deifel <hpd@hpdeifel.de> @hpdeifel":
-        - hledger-iadd < 0 # GHC 8.4.2 bounds
+        - hledger-iadd
 
     "Roy Levien <royl@aldaron.com> @orome":
         - crypto-enigma