set dev version (#7674)

Author: lhoestq

setup.py

@@ -229,7 +229,7 @@
 
 setup(
     name="datasets",
-    version="4.0.0",  # expected format is one of x.y.z.dev0, or x.y.z.rc1 or x.y.z (no to dashes, yes to dots)
+    version="4.0.1.dev0",  # expected format is one of x.y.z.dev0, or x.y.z.rc1 or x.y.z (no to dashes, yes to dots)
     description="HuggingFace community-driven open-source library of datasets",
     long_description=open("README.md", encoding="utf-8").read(),
     long_description_content_type="text/markdown",

src/datasets/__init__.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "4.0.0"
+__version__ = "4.0.1.dev0"
 
 from .arrow_dataset import Column, Dataset
 from .arrow_reader import ReadInstruction