Introduce pyupgrade

• Syntax upgrader
• https://github.com/asottile/pyupgrade

Todos

• Introduce pyupgrade hook:
• Apply pyupgrade to Python files
• Add pyupgrade job based on pre-commit

changed milestone to %1.1.0

added CI/CD Dep Dev Env labels

assigned to @moul

marked this issue as related to silkaj#403 (closed)

marked this issue as related to #146 (closed)

mentioned in commit daa7caf0

mentioned in commit 4edbb287

mentioned in commit 1ad034d1

mentioned in merge request !164 (merged)

mentioned in issue #146 (closed)

mentioned in commit f0b3cd02

mentioned in commit 12a9cf0b

mentioned in commit c1157856

closed with merge request !164 (merged)