This change fixes the installation of packages using a url source.
Previously, the installer attempted to install the package using the
name ignoring the source url.

* Setup basic Github actions

* Remove Travis and Appveyor config files

* Update pre-commit configuration

remove --> uninstall

doc: fix some typos

- Add missing ".py" for file structure
- Fix slash for Windows path
- Fix word case to match other titles

Catch and deal with failed symlinking on Windows

Check to ensure the global config exists before reading

remove NoReturn, use None instead

950 simplified

Building upon patch from [#1299][1]

[1]: https://github.com/sdispater/poetry/pull/1299/commits

Co-authored-by: David Hotham <david.hotham@metaswitch.com>

Fixes cases where the version part of the wheel file name would become

`0.1b1_gitbranch.buildno.1`

instead of

`0.1b1+gitbranch.buildno.1`

Fixes sdispater/poetry#756

fix typo in doc site

Add bool typing for VCSDependency.accepts_prereleases

See https://github.com/pypa/warehouse/issues/6345 and https://github.com/pypa/warehouse/pull/6368

* Improve the export command

* Update documentation

Mkdir is breaking when folder is already existing, this allows it not to fail if target exists

* Add `-o` flag for `export` command

The export command now prints to standard output by default.  To store the
output in a file, the new `-o <filename>` argument can be used.

* Fix code style

* Improve usage examples for `export` command

* Add missing import statement to exporter module

* Make Exporter class work w/ IO objects for output

* Fix test suite for `Exporter` utility class

* Refactor configuration code

* Add support for local configuration

* Update documentation