Render JSON dates as timestamp integers

Fixes: #113
SemVer: bugfix

Author: alvarolopez

caso/messenger/ssm.py

@@ -193,6 +193,7 @@ def push(self, records):
                 aux = []
                 for k, v in six.iteritems(record.dict(**opts)):
                     if v is not None:
+                        # FIXME(aloga): to be handled at record level.
                         if isinstance(v, datetime.datetime):
                             aux.append(f"{k}: {int(v.timestamp())}")
                         else:

caso/record.py

@@ -189,6 +189,7 @@ def map_fields(field: str) -> str:
             }
             return d.get(field, field)
 
+        json_encoders = {datetime: lambda v: int(v.timestamp())}
         alias_generator = map_fields
         allow_population_by_field_name = True
         underscore_attrs_are_private = True

releasenotes/notes/fix-timestamps-84cd81de7d26e164.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fixes issue 115, where timestamps where incorrecly rendered. This fix
+    requires a republish of records.