feat(SDFS): Add destructor to clean up resources

Author: JakubAndrysek

libraries/SD/src/SD.cpp

@@ -22,6 +22,10 @@ using namespace fs;
 
 SDFS::SDFS(FSImplPtr impl) : FS(impl), _pdrv(0xFF) {}
 
+SDFS::~SDFS() {
+  end();
+}
+
 bool SDFS::begin(uint8_t ssPin, SPIClass &spi, uint32_t frequency, const char *mountpoint, uint8_t max_files, bool format_if_empty) {
   if (_pdrv != 0xFF) {
     return true;

libraries/SD/src/SD.h

@@ -26,6 +26,7 @@ class SDFS : public FS {
 
 public:
   SDFS(FSImplPtr impl);
+  ~SDFS();
   bool begin(
     uint8_t ssPin = SS, SPIClass &spi = SPI, uint32_t frequency = 4000000, const char *mountpoint = "/sd", uint8_t max_files = 5, bool format_if_empty = false
   );