feat: allow all rfc3339 size lengths

Signed-off-by: Christina Sørensen <christina@cafkafk.com>

src/main.rs

@@ -8,7 +8,7 @@ fn main() -> io::Result<()> {
     if args.len() == 1
         || !(args[1].len() == 8 as usize
             || args[1].len() == 19 as usize
-            || args[1].len() == 21 as usize)
+            || args[1].len() >= 21 as usize)
     {
         println!("usage: since hh:mm:ss"); //8
         println!("usage: since yyyy-mm-dd hh:mm:ss"); //19