Fix compile error on macOS 11.15.2 (introduced by commit 30e3ef4)

src/command/FileCommands.cxx

@@ -49,6 +49,7 @@
 
 #include <algorithm>
 #include <cassert>
+#include <array>
 
 gcc_pure
 static bool

src/sticker/Database.cxx

@@ -28,6 +28,7 @@
 
 #include <cassert>
 #include <iterator>
+#include <array>
 
 using namespace Sqlite;