changelog: update 1.4.0

changelog/1.4.0.md

@@ -12,6 +12,7 @@ Contents:
 - [oatpp::Tree](#oatpptree)
 - [Remapper](#remapper)
 - [oatpp::web::mime::ContentMappers](#oatppwebmimecontentmappers)
+- [New OATPP_LOGx format](#new-oatpp_logx-format)
 - [Restructuring](#restructuring)
 
 
@@ -149,6 +150,29 @@ on `Content-Type`/`Accept` headers.
   }
 ```
 
+## New OATPP_LOGx format
+
+Now oatpp logs are type-safe. Also log formatting changed.
+
+#### Macro
+
+| old logs     | new logs     |
+|--------------|--------------|
+| `OATPP_LOGV` | `OATPP_LOGv` |
+| `OATPP_LOGD` | `OATPP_LOGd` |
+| `OATPP_LOGI` | `OATPP_LOGi` |
+| `OATPP_LOGW` | `OATPP_LOGw` |
+| `OATPP_LOGE` | `OATPP_LOGe` |
+
+#### Formatting
+
+Instead of old formatting "%s", "%d", "%f" use "{}" for any variable type:
+
+```cpp
+OATPP_LOGd("MyController", "User: name={}, age={}", user->name, user->age)
+```
+
+
 ## Restructuring
 
 ### Files