fixed termsize panic when output is redirected

src/lib.rs

@@ -1,6 +1,8 @@
+use termsize::Size;
+
 pub trait TerminalSize {
     fn get_width(&self) -> usize {
-        let terminal = termsize::get().unwrap();
+        let terminal: Size = termsize::get().unwrap_or(Size { rows: 150, cols: 150 });
         terminal.cols.into()
     }
 }