Prepare 0.2.0 release
Prepare 0.3.0 release
Revert "Prepare 0.3.0 release"

This reverts commit df1e4e8f55e9f311a13e5e2e7d4ed2e1671afdd5.
Revert "Prepare 0.2.0 release"

This reverts commit 24587c22cd5accb142c6b527ed877c87013c03f7.
Prepare 0.2.0 release
Prepare 0.3.0 release
Prepare 0.4.0 release