tests: Update snapshot tests for Textual 0.77

The new version of Textual adds a key to the footer for opening the
command palette. We could disable this, since it's taking up a bit of
precious screen real estate, but one of the options in the command
palette is a full list of keys bindings that can be opened in a side
panel. That's useful enough to justify keeping this item, even if it
means cutting off our own bindings.

Signed-off-by: Matt Wozniski <[email protected]>

Author: godlygeek

tests/conftest.py

@@ -5,7 +5,7 @@
 from packaging import version
 
 SNAPSHOT_MINIMUM_VERSIONS = {
-    "textual": "0.73",
+    "textual": "0.77",
     "pytest-textual-snapshot": "1.0",
 }