Exclude changelog from pre-commit spellcheck (#1083)

Exclude the changelog from the pre-commit codespell check- this is to prevent CI failures after release when the changelog is updated, as suggested here rapidsai/cudf#12097 (review)

This also exports the `__version__` for pylibraft / raft_dask, which was missing previously

Authors:
  - Ben Frederickson (https://github.com/benfred)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)

URL: #1083

.pre-commit-config.yaml

@@ -97,6 +97,8 @@ repos:
         rev: v2.1.0
         hooks:
               - id: codespell
+                exclude: (?x)^(^CHANGELOG.md$)
+
 
 default_language_version:
       python: python3

python/pylibraft/pylibraft/__init__.py

@@ -12,3 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+from pylibraft._version import get_versions
+
+__version__ = get_versions()["version"]
+del get_versions

python/raft-dask/raft_dask/__init__.py

@@ -13,4 +13,9 @@
 # limitations under the License.
 #
 
+from raft_dask._version import get_versions
+
 from .include_test import raft_include_test
+
+__version__ = get_versions()["version"]
+del get_versions