Add support for TM1638 Led and Key component (#3340)

esphome/components/tm1638/binary_sensor/tm1638_key.cpp

@@ -0,0 +1,13 @@
+#include "tm1638_key.h"
+
+namespace esphome {
+namespace tm1638 {
+
+void TM1638Key::keys_update(uint8_t keys) {
+  bool pressed = keys & (1 << key_code_);
+  if (pressed != this->state)
+    this->publish_state(pressed);
+}
+
+}  // namespace tm1638
+}  // namespace esphome