make filter type-aware

We interpret the following types:

- ISO8601-formatted strings as dates,
- integer-formatted strings as integers,
- all other strings as strings.

If the filter value matches a format, it is cast into the respective
data type. For comparison-based filtering, the tag's value is then cast
into the same data type and comparison is performed type-aware. If the
tag's value is not castable, we consider it not matching.

1 files changed, 1 insertions, 0 deletions

diff --git a/anissue.cabal b/anissue.cabal
index 8988ebf..732a5e4 100644
--- a/anissue.cabal
+++ b/anissue.cabal
@@ -114,6 +114,7 @@ executable anissue
       DisambiguateRecordFields
       DuplicateRecordFields
       ForeignFunctionInterface
+      GADTs
       LambdaCase
       OverloadedRecordDot
       OverloadedStrings