Rollup of:
- Update dependencies; TS 4.4, Prettier 2.4
- Explicitly handle unrooted execution environments (e.g., open file mode), preventing various crashes and oddities.
- Generate default values in method overload signatures. Previously, we didn't include them, which generated the wrong signature.
- Disable webpack caching (which recently broke upstream).
- Use attribute docstrings for type aliases in completion and hover.
- Clean up import resolver search path cache, which was leftover from the per-execution environment python interpreter removal.
- Modify parser to change the range of parenthesized expressions to their contents. This improves the ranges returned in hovers, document highlight, etc.
- Add boolean to ConfigOptions to check if the config was loaded from a config object (i.e., was produced in part by a `pyrightconfig.json` or `pyproject.toml` with a pyright section).
Co-authored-by: Bill Schnurr <bschnurr@microsoft.com>
