Add ePoc prerequisites

package.json

 {
   "name": "@epoc/epoc-types",
-  "version": "2.0.0-beta.12",
+  "version": "2.0.0-beta.13",
   "description": "ePoc (Electronic Pocket Open Course) types specifications",
   "main": "dist/index.ts",
   "types": "dist/index.d.ts",

src/v1/epoc.ts

@@ -16,6 +16,7 @@ export interface EpocMetadata {
     thumbnail : string;
     summary: html;
     objectives: string[];
+    prerequisites: string[];
     chaptersCount: number;
     assessmentsCount: number;
     download: string;

src/v2/epoc.ts

@@ -67,6 +67,11 @@ export interface EpocMetadata {
      */
     objectives: string[];
 
+    /**
+     * Defines the list of prerequisites to know before starting the ePoc
+     */
+    prerequisites: string[];
+
     /**
      * Specifies the total of chapters of the ePoc
      */