Minor update

include/indicator/progressbar.hpp

@@ -1,11 +1,13 @@
 #pragma once
 #include <atomic>
-#include <indicators/termcolor.hpp>
+#include <indicator/termcolor.hpp>
 #include <iostream>
 #include <mutex>
 #include <string>
 #include <thread>
 
+namespace indicator {
+
 class ProgressBar {
 public:
   enum class Color { GREY, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE };
@@ -160,3 +162,5 @@ private:
       std::cout << termcolor::reset << std::endl;
   }
 };
+
+}