Replaced ToDasherCase with ConvertCase (#7131)

include/flatbuffers/code_generators.h

@@ -97,8 +97,6 @@ class BaseGenerator {
                                   const Namespace &ns,
                                   const bool dasherize = false);
 
-  static std::string ToDasherizedCase(const std::string pascal_case);
-
   std::string GeneratedFileName(const std::string &path,
                                 const std::string &file_name,
                                 const IDLOptions &options) const;

include/flatbuffers/util.h

@@ -699,6 +699,8 @@ enum class Case {
   kAllUpper = 5,
   // thequickbrownfox
   kAllLower = 6,
+  // the-quick-brown-fox
+  kDasher = 7,
 };
 
 // Convert the `input` string of case `input_case` to the specified `output_case`.