Log Message:
py-posting: update to 1.9.3.

1.9.3

Upgrade and pin Textual at 0.74.0.
Simplify text area theme naming conventions.
fix: Ensure response status code border text is styled using the theme.
fix: Ensure text area theme automatically updates when command palette is used \ 
to change theme.

1.9.2

Fix check for missing colors in xresources by @SqrtMinusOne in #64

1.9.1

Fix crash in auth form.

1.9.0

User defined themes
New configuration options
Fixes
Testing