Jupyter-core

[on GitHub](https://github.com/jupyter/jupyter_core/releases/tag/4.6.3)

- Changed windows secure_write path to skip all filesystem permission
checks when running in insecure mode. Too many exception paths
existed for mounted file systems to reliably try to set them before
opting out with the insecure write pattern.

[on GitHub](https://github.com/jupyter/jupyter_core/releases/tag/4.6.2)

- Add ability to allow insecure writes with
JUPYTER_ALLOW_INSECURE_WRITES environment variable
([182](https://github.com/jupyter/jupyter_core/pull/182)).
- Docs typo and build fixes
- Added python 3.7 and 3.8 builds to testing

[on GitHub](https://github.com/jupyter/jupyter_core/releases/tag/4.6.1)

- Tolerate execute bit in owner permissions when validating secure
writes ([173](https://github.com/jupyter/jupyter_core/pull/173)).
- Fix project name typo in copyright ([171](https://github.com/jupyter/jupyter_core/pull/171)).

[on GitHub](https://github.com/jupyter/jupyter_core/releases/tag/4.6.0)

- Unicode characters existing in the user's home directory name are
properly handled ([131](https://github.com/jupyter/jupyter_core/pull/131)).
- `mock` is now only required for testing on Python 2
([157](https://github.com/jupyter/jupyter_core/pull/157)).
- Deprecation warnings relative to `_runtime_dir_changed` are no
longer produced ([158](https://github.com/jupyter/jupyter_core/pull/158)).
- The `scripts` directory relative to the current python environment
is now appended to the search directory for subcommands
([162](https://github.com/jupyter/jupyter_core/pull/162)).
- Some utility functions (`exists()`, `is_hidden()`, `secure_write()`)
have been moved from `jupyter_client` and `jupyter_server` to
`jupyter_core` ([163](https://github.com/jupyter/jupyter_core/pull/163)).
- Fix error on Windows when setting private permissions
([166](https://github.com/jupyter/jupyter_core/pull/166)).