image-factory 1.0.2 (2021-11-12)

Fix issues found by pylint 2.11.1 (fixes Debian bug #998571):
- tests: Use with for subprocess.Popen and open calls
- Open log files explicitly as UTF-8
- Replace .format() with f-strings
Drop Python 2 support
Update my email address to @ionos.com
tests: Add black code formatting check
tests: Check import definitions order with isort
tests: Fix running tests as root
tests: Disable bad-continuation for pylint (for Ubuntu 20.04)
Use ftp.rz.uni-frankfurt.de as example CentOS mirror (old mirror is gone)

image-factory 1.0.1 (2021-01-29)