MOD: Upgrade databento_dbn to latest

Author: nmacholl

CHANGELOG.md

@@ -26,6 +26,8 @@
 - Upgraded `databento-dbn` to 0.29.0
   - Added `COMMODITY_SPOT` `InstrumentClass` variant
 - Improved handling of `datetime` and `date` objects in `start` and `end` parameters
+- Upgraded `databento-dbn` to 0.31.0
+  - Fixed Python type annotation for `SystemMsg.is_heartbeat()` method that was previously annotated as a property
 
 ## 0.49.0 - 2025-03-04
 

README.md

@@ -32,7 +32,7 @@ The library is fully compatible with the latest distribution of Anaconda 3.9 and
 The minimum dependencies as found in the `pyproject.toml` are also listed below:
 - python = "^3.9"
 - aiohttp = "^3.8.3"
-- databento-dbn = "0.29.0"
+- databento-dbn = "0.31.0"
 - numpy= ">=1.23.5"
 - pandas = ">=1.5.3"
 - pip-system-certs = ">=4.0" (Windows only)

pyproject.toml

@@ -32,7 +32,7 @@ aiohttp = [
     {version = "^3.8.3", python = "<3.12"},
     {version = "^3.9.0", python = "^3.12"}
 ]
-databento-dbn = "0.29.0"
+databento-dbn = "0.31.0"
 numpy = [
     {version = ">=1.23.5", python = "<3.12"},
     {version = ">=1.26.0", python = "^3.12"}