Fixed an issue when pio package unpublish command crashes // Resolve platformio#3660

Author: ivankravets

HISTORY.rst

@@ -13,6 +13,7 @@ PlatformIO Core 5
 
 - Fixed an issue when using a custom git/ssh package with `platform_packages <https://docs.platformio.org/page/projectconf/section_env_platform.html#platform-packages>`__ option (`issue #3624 <https://github.com/platformio/platformio-core/issues/3624>`_)
 - Fixed an issue with "ImportError: cannot import name '_get_backend' from 'cryptography.hazmat.backends'" when using `Remote Development <https://docs.platformio.org/page/plus/pio-remote.html>`__ on RaspberryPi device (`issue #3652 <https://github.com/platformio/platformio-core/issues/3652>`_)
+- Fixed an issue when `pio package unpublish <https://docs.platformio.org/page/core/userguide/package/cmd_unpublish.html>`__ command crashes (`issue #3660 <https://github.com/platformio/platformio-core/issues/3660>`_)
 
 5.0.0 (2020-09-03)
 ~~~~~~~~~~~~~~~~~~

platformio/commands/package.py

@@ -107,7 +107,7 @@ def package_unpublish(package, type, undo): # pylint: disable=redefined-builtin
  type=type,
  name=spec.name,
  owner=spec.owner,
- version=spec.requirements,
+ version=str(spec.requirements),
  undo=undo,
  )
  click.secho(response.get("message"), fg="green")