Bump software version to 2.0

Update the bootloader software version constant from 1.3 to 2.0 to reflect the new release.

Author: vanvught

bootloader-tftp/include/software_version.h

@@ -26,6 +26,6 @@
 #ifndef SOFTWARE_VERSION_H_
 #define SOFTWARE_VERSION_H_
 
-constexpr char kSoftwareVersion[] = "1.3";
+constexpr char kSoftwareVersion[] = "2.0";
 
 #endif // SOFTWARE_VERSION_H_