Revert "Disable hpqtypes-extras (scrive/hpqtypes-extras#129)."

This reverts commit 67c1e33.

Author: alaendle

build-constraints.yaml

@@ -4948,7 +4948,7 @@ packages:
 
     "Jan Synacek <jan.synacek@scrive.com> @jsynacek":
         - hpqtypes
-        - hpqtypes-extras < 0 # 1.18.0.0 https://github.com/scrive/hpqtypes-extras/issues/129
+        - hpqtypes-extras
         - fields-json
         - log-base
         - unjson