build: treat warnings as errors (#228)

* build: treat warnings as errors

* ignore warnings which only appear in 3.7/3.8

* ignore warnings which only appear in 3.7/3.8

Author: parthea

pytest.ini

@@ -0,0 +1,14 @@
+[pytest]
+filterwarnings =
+    # treat all warnings as errors
+    error
+    # Remove once support for python 3.7 and 3.8 is dropped
+    # Ignore warnings from older versions of pandas which still have python 3.7/3.8 support
+    ignore:.*distutils Version classes are deprecated:DeprecationWarning
+    ignore:.*resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning
+    # Remove once https://github.com/dateutil/dateutil/issues/1314 is fixed
+    # dateutil is a dependency of pandas
+    ignore:datetime.datetime.utcfromtimestamp\(\) is deprecated:DeprecationWarning:dateutil.tz.tz
+    # Remove once https://github.com/googleapis/python-db-dtypes-pandas/issues/227 is fixed
+    ignore:.*any.*with datetime64 dtypes is deprecated and will raise in a future version:FutureWarning
+    ignore:.*all.*with datetime64 dtypes is deprecated and will raise in a future version:FutureWarning