Added tag 5.4.1 for changeset 7167e5962f1a

prepare version 5.4.1

process.py: fix python 3.10 compat

See https://docs.python.org/3/whatsnew/3.10.html#removed

"The loop parameter has been removed from most of asyncio‘s high-level API"

Added tag 5.4.0 for changeset 19cb181bb4d8

Prepare version 5.4.0

main packer widget: preserve a little bit more the preferred user orientation

for example, on a small screen size, if the user specify HORIZONTAL,
when the screen is reduced, we preserve the horizontal orientation.

main widget: allow user to specify a maximalized pane on startup.

main packer widget: preserve focus and maximalization while changing split orientation

Mostly, when the user reduces the window size, `gh` changes
automatically the split orientation. In this case, `gh` should
preserve the focused pane and maximalization.

To do so, We build the columns/pile widgets once and apply
focus/maximalization to both everytime.

widget: allow users to maximize the focused pane

Just enlarge the focused pane.

Note: users can maximize the patch pane, and browse the tree with
      `alt+{up,down}`.

widget: allow users to specify the default orientation

Related to https://todo.sr.ht/~alainl/lairucrem/4

widget: coding-style, use constant symbols

widget: coding-style

widget: code simplification

Guessing orientation depends only on the screen size. The previous orientation is meaningless there.