fix: add vector include dir

Signed-off-by: Tony Gorez <[email protected]>

src/io/unix/io.cc

@@ -3,6 +3,7 @@
 #include <iostream>  // std::cout, std::endl
 #include <termios.h> // tcgetattr, tcsetattr
 #include <unistd.h>  // STDIN_FILENO
+#include <vector>    // std::vector
 
 namespace qupp::io {
 Terminal::Terminal() noexcept { tcgetattr(STDIN_FILENO, &original_termios_); }