[test] fixing 1.9 nightly install (#706)

* [test] fixing 1.9 nightly install

* update cache version so that we don't keep reinstall
Co-authored-by: Min Xu <min.xu.public@gmail.com>

.circleci/config.yml

@@ -114,7 +114,7 @@ install_dep_190: &install_dep_190
         # check if we have restored venv cache (/home/circleci/venv) correctly, if so, just skip
         if [ -f /home/circleci/venv/check_version.py ]; then python /home/circleci/venv/check_version.py torch eq 1.8 && exit 0; fi
         # start installing
-        pip install --pre --progress-bar off torch==1.9.0.dev20210330+cu101 torchvision==0.10.0.dev20210330+cu101 -f https://download.pytorch.org/whl/nightly/cu101/torch_nightly.html
+        pip install --pre --progress-bar off torch==1.9.0.dev20210415+cu101 torchvision==0.10.0.dev20210415+cu101 -f https://download.pytorch.org/whl/nightly/cu101/torch_nightly.html
         pip install --progress-bar off -r requirements-test.txt
         pip install --progress-bar off -r requirements-benchmarks.txt
         python -c 'import torch; print("Torch version:", torch.__version__)'

setup.py

@@ -79,4 +79,4 @@ if __name__ == "__main__":
 
 
 # Bump this number if you want to force a CI cache invalidation on the pip venv.
-# CI cache version: 2
+# CI cache version: 3