Adding upstream version 0.12.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/snapshot_tests/snapshot_apps/data_table_max_width.py

@@ -0,0 +1,35 @@
+import csv
+import io
+
+from textual.app import App, ComposeResult
+from textual_fastdatatable import ArrowBackend, DataTable
+
+CSV = """lane,swimmer,country,time
+4,Joseph Schooling,Singapore,50.39
+2,Michael Phelps,United States,51.14
+5,Chad le Clos,South Africa,51.14
+6,László Cseh,Hungary,51.14
+3,Li Zhuhao,China,51.26
+8,Mehdy Metella,France,51.58
+7,Tom Shields,United States,51.73
+1,Aleksandr Sadovnikov,Russia,51.84"""
+
+
+class TableApp(App):
+    def compose(self) -> ComposeResult:
+        rows = csv.reader(io.StringIO(CSV))
+        labels = next(rows)
+        data = [row for row in rows]
+        backend = ArrowBackend.from_pydict(
+            {label: [row[i] for row in data] for i, label in enumerate(labels)}
+        )
+        table = DataTable(
+            backend=backend, cursor_type="range", max_column_content_width=8
+        )
+        table.focus()
+        yield table
+
+
+if __name__ == "__main__":
+    app = TableApp()
+    app.run()