fix(nvs_flash): removed usage of 'using namepsace std' in a header file

components/nvs_flash/src/nvs_cxx_api.cpp

@@ -17,6 +17,8 @@
 #include "nvs_handle_locked.hpp"
 #include "nvs_platform.hpp"
 
+using namespace std;
+
 namespace nvs {
 
 std::unique_ptr<NVSHandle> open_nvs_handle_from_partition(const char *partition_name,

components/nvs_flash/src/nvs_pagemanager.cpp

@@ -5,6 +5,8 @@
  */
 #include "nvs_pagemanager.hpp"
 
+using namespace std;
+
 namespace nvs
 {
 esp_err_t PageManager::load(Partition *partition, uint32_t baseSector, uint32_t sectorCount)

components/nvs_flash/src/nvs_partition_manager.cpp

@@ -12,6 +12,8 @@
 #include "nvs_encrypted_partition.hpp"
 #endif // ! LINUX_TARGET
 
+using namespace std;
+
 namespace nvs {
 
 NVSPartitionManager* NVSPartitionManager::instance = nullptr;

components/nvs_flash/src/nvs_types.hpp

@@ -15,8 +15,6 @@
 #include "compressed_enum_table.hpp"
 #include "string.h"
 
-using namespace std;
-
 namespace nvs
 {
 
@@ -97,7 +95,7 @@ public:
 
     void getKey(char* dst, size_t dstSize)
     {
-        strncpy(dst, key, min(dstSize, sizeof(key)));
+        strncpy(dst, key, std::min(dstSize, sizeof(key)));
         dst[dstSize-1] = 0;
     }