[Python] Bump version to 0.2.0dev
[Python] Bump version to 0.2.0dev

wesm/feather,chris-b1/feather,wesm/feather,chris-b1/feather,chris-b1/feather,wesm/feather,wesm/feather,wesm/feather,chris-b1/feather,wesm/feather,chris-b1/feather,wesm/feather,wesm/feather,chris-b1/feather