-----------------------------
Features & Improvements
- Add hand-written zsh completion script. [188](https://github.com/pdm-project/pdm/issues/188)
- Add a special value `:all` given to `-s/--section` to refer to all sections under the same species.
Adjust `add`, `sync`, `install`, `remove` and `update` to support the new `dev-dependencies` groups. Old behavior will be kept the same. [351](https://github.com/pdm-project/pdm/issues/351)
- `dev-dependencies` is now a table of dependencies groups, where key is the group name and value is an array of dependencies. These dependencies won't appear in the distribution's metadata. `dev-dependencies` of the old format will turn into `dev` group under `dev-dependencies`. [351](https://github.com/pdm-project/pdm/issues/351)
- Move `dev-dependencies`, `includes`, `excludes` and `package-dir` out from `[project]` table to `[tool.pdm]` table. The migration will be done automatically if old format is detected. [351](https://github.com/pdm-project/pdm/issues/351)
- Throws an error with meaningful message when no candidate is found for one requirement. [357](https://github.com/pdm-project/pdm/issues/357)
- Support `--dry-run` option for `update` command to display packages that need update, install or removal. Add `--top` option to limit to top level packages only. [358](https://github.com/pdm-project/pdm/issues/358)
- Full-featured completion scripts for Zsh and Powershell - section selection, package name autocompletion and so on. Windows is a first-class citizen! [367](https://github.com/pdm-project/pdm/issues/367)
- Support non-interactive `init` command via `-n/--non-interactive` option. No question will be asked in this mode. [368](https://github.com/pdm-project/pdm/issues/368)
- Show project packages path(PEP 582) in the output of `pdm info`, also add an option `--packages` to show that value only. [372](https://github.com/pdm-project/pdm/issues/372)
Bug Fixes
- Fix a bug that pure python libraries are not loaded to construct the WorkingSet. [346](https://github.com/pdm-project/pdm/issues/346)
- Don't write `<script>-X.Y` variant to the bin folder. [365](https://github.com/pdm-project/pdm/issues/365)
- Python is now run in isolated mode via subprocess to avoid accidentally importing user packages. [369](https://github.com/pdm-project/pdm/issues/369)
- Don't overwrite existing dependencies when importing from requirements.txt. [370](https://github.com/pdm-project/pdm/issues/370)
Improved Documentation
- Add instructions of how to integrate PDM with Emacs, contributed by linw1995. [372](https://github.com/pdm-project/pdm/issues/372)
Removals and Deprecations
- Remove the support of project path following `-g/--global` that was deprecated in `1.4.0`. One should use `-g -p <project_path>` for that purpose. [361](https://github.com/pdm-project/pdm/issues/361)
Miscellany
- Add test coverage to PDM. [109](https://github.com/pdm-project/pdm/issues/109)
- Add type annotations into untyped functions to start using mypy. [354](https://github.com/pdm-project/pdm/issues/354)
- Refactor the format converter code to be more explicit. [360](https://github.com/pdm-project/pdm/issues/360)