release v1.5.1 (#659)

Summary:
Pull Request resolved: #659

as title

Differential Revision: D60290993

fbshipit-source-id: 86cae51208281c294dcf98bf36506a0775b76358

Author: HuanyuZhang

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## v1.5.1
+
+### Bug fixes
+* Make the import of opt_einsum.contract (linear.py) explicit (#658)
+
 ## v1.5
 
 ### New features
@@ -12,7 +17,6 @@ Fast Gradient Clipping and Ghost Clipping (#656)
 * Fix GPU-CPU device mismatch error in util filter_dilated_rows (#633)
 * Fix Opacus's runtime error with an empty batch (issue 612) (#631)
 
-
 ## v1.4.1
 
 ### Bug fixes

opacus/version.py

@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.5"
+__version__ = "1.5.1"