squash! examples : add wer cli example

Add include for tuple in wer.cpp

Author: danbev

examples/wer.cpp

@@ -6,6 +6,7 @@
 #include <string>
 #include <algorithm>
 #include <sstream>
+#include <tuple>
 
 std::vector<std::string> split_into_words(const std::string& text) {
     std::vector<std::string> words;