add icon for .bats files (#968)

* add icon for .bats files

This adds the same icon as BASH for `.bats` files.
Co-authored-by: NMélanie Chauvel <perso@hack-libre.org>

src/output/icons.rs

@@ -119,6 +119,7 @@ pub fn icon_for_file(file: &File<'_>) -> char {
             "bash_profile"  => '\u{f489}', // 
             "bashrc"        => '\u{f489}', // 
             "bat"           => '\u{f17a}', // 
+            "bats"          => '\u{f489}', // 
             "bmp"           => '\u{f1c5}', // 
             "bz"            => '\u{f410}', // 
             "bz2"           => '\u{f410}', // 