Given that we've moved to GitHub actions, and Python 3.4 was end of life in 2019-03-18, and no current distros ship with it. While the library will probably support 3.4 (and 3.3 and ...) for a while yet, it's not exactly "necessary" to do this, but on the other hand, no point guaranteeing support for a dead version when we hit 1.0 and dropping it would require moving to 2.0.
Given that we've moved to GitHub actions, and Python 3.4 was end of life in 2019-03-18, and no current distros ship with it. While the library will probably support 3.4 (and 3.3 and ...) for a while yet, it's not exactly "necessary" to do this, but on the other hand, no point guaranteeing support for a dead version when we hit 1.0 and dropping it would require moving to 2.0.