Unskip tests since doctest is constrained; add link for #2681 (hslua)

build-constraints.yaml

@@ -3258,8 +3258,7 @@ packages:
         - Win32 == 2.3.1.1
 
     "Stackage upper bounds":
-        # WIP: Issues are coming ...
-        - base < 4.10
+        # https://github.com/fpco/stackage/issues/2681
         - hslua < 0.6
 
         # https://github.com/fpco/stackage/issues/2663
@@ -3423,19 +3422,6 @@ skipped-tests:
     # Outdated dependencies
     # These can periodically be checked for updates;
     # just remove these lines and run `stackage-curator check' to verify.
-    # doctest 0.12
-    - ad
-    - attoparsec-time
-    - bits
-    - bound
-    - bytes
-    - cgi
-    - clash-prelude
-    - comonad
-    - distributive
-    - email-validate
-    - flow
-    - trifecta
     # - genvalidity-property # bounds: QuickCheck
     - hasmin
     - http-api-data