Update _from_schema.py

Issue:Aliases for RFC 3339 formats are defined but not used #79

Author: jjpal

src/hypothesis_jsonschema/_from_schema.py

@@ -373,6 +373,8 @@ def relative_json_pointers() -> st.SearchStrategy[str]:
 STRING_FORMATS = {
     **{name: rfc3339(name) for name in RFC3339_FORMATS},
     "color": st.from_regex(_WEBCOLOR_REGEX) | st.sampled_from(_CSS21_COLOR_NAMES),
+    "date": rfc3339("full-date"),
+    "time": rfc3339("full-time"),
     "email": st.emails(),
     "idn-email": st.emails(),
     "hostname": prov.domains(),