Updates security definitions for Thing Description

Replaces 'NosecScTD' with 'BearerTD' in 'SecurityDefinitionsTD' interface
Updates 'BearerTD' interface with additional properties for bearer token

Fixes #456

lib/types/item.ts

@@ -75,7 +75,7 @@ export interface ContextClassTD {
  */
 export interface SecurityDefinitionsTD {
   nosec_sc?: NosecScTD
-  Bearer?: NosecScTD
+  Bearer?: BearerTD
 }
 
 /**
@@ -92,11 +92,15 @@ export interface NosecScTD {
 /**
  * Represents a "Bearer" scheme for a Thing Description.
  *
- * @interface NosecScTD
+ * @interface BearerTD
  *
- * @property {string} scheme - The scheme identifier, typically "Bearer" to indicate Bearer token.
+ * @property {string} in - The location of the bearer token.
+ * @property {string} alg - The algorithm used for the bearer token.
+ * @property {string} name - The name of the bearer token.
+ * @property {string} format - The format of the bearer token.
+ * @property {string} scheme - The scheme identifier, typically "Bearer".
  */
-export interface Bearer {
+export interface BearerTD {
   in:     string;
   alg:    string;
   name:   string;