add example policy with a ignored violation

Author: keewis

envs/env2.yaml

@@ -6,3 +6,4 @@ dependencies:
   - xarray=2023.10.0
   - dask=2023.10.0
   - distributed=2023.10.0
+  - pydap=3.5.1

policy.yaml

@@ -0,0 +1,26 @@
+exclude:
+  - coveralls
+  - pip
+  - pytest
+  - pytest-asyncio
+  - pytest-cov
+  - pytest-env
+  - pytest-mypy-plugins
+  - pytest-timeout
+  - pytest-xdist
+  - pytest-hypothesis
+channels:
+  - conda-forge
+platforms:
+  - noarch
+  - linux-64
+# in case conda-forge release dates are not accurate enough
+overrides: {}
+policy:
+  # all packages in months
+  packages:
+    python: 30
+    numpy: 18
+  default: 12
+  ignored_violations:
+    - pydap