Use correct venv activate step

Author: marthacryan

.circleci/config.yml

@@ -55,36 +55,36 @@ commands:
       - run:
           name: Test core
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             pytest tests/test_core
           no_output_timeout: 20m
       - run:
           name: Test optional
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             pytest tests/test_optional
           no_output_timeout: 40m
       - run:
           name: Test utils
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             pytest tests/test_plotly_utils/
           no_output_timeout: 20m
       - run:
           name: Test io
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             pytest tests/test_io
           no_output_timeout: 20m
       - run:
           name: Test dependencies not imported
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             python -m pytest -x test_init/test_dependencies_not_imported.py
       - run:
           name: Test lazy imports
           command: |
-            . venv/bin/activate
+            source .venv/bin/activate
             python -m pytest -x test_init/test_lazy_imports.py
   test_orca:
     parameters: