Bump version to 1.0.0a3

CHANGELOG.md

@@ -9,6 +9,9 @@
 - Added a `env use` command to control the Python version used by the project.
 - Added a `env list` command to list the virtualenvs associated with the current project.
 - Added a `env remove` command to delete virtualenvs associated with the current project.
+- Added support for declaring a specific source for dependencies.
+- Added support for disabling PyPI and making another repository the default one.
+- Added support for declaring private repositories as secondary.
 
 ### Changed
 

poetry/__version__.py

-__version__ = "1.0.0a2"
+__version__ = "1.0.0a3"

pyproject.toml

 [tool.poetry]
 name = "poetry"
-version = "1.0.0a2"
+version = "1.0.0a3"
 description = "Python dependency management and packaging made easy."
 authors = [
     "Sébastien Eustace <sebastien@eustace.io>"