Removed "explicit" keyword from constructors

source/boxing/Boolean.hpp

@@ -17,7 +17,7 @@ namespace ls_std {
   class Boolean : public Class, IBoxing {
     public:
 
-      explicit Boolean(bool _value);
+      Boolean(bool _value);
       Boolean();
       ~Boolean() = default;
 

source/boxing/Integer.hpp

@@ -17,7 +17,7 @@ namespace ls_std {
   class Integer : public Class, IBoxing {
     public:
 
-      explicit Integer(int _value);
+      Integer(int _value);
       Integer();
       ~Integer() = default;