Increment version ahead of release

Author: JeanKossaifi

src/configmypy/__init__.py

@@ -1,7 +1,7 @@
-__version__ = '0.1.0'
+__version__ = '0.2.0'
 
 from .bunch import Bunch
 
 from .argparse_config import ArgparseConfig
 from .yaml_config import YamlConfig
-from .pipeline_config import ConfigPipeline
+from .pipeline_config import ConfigPipeline