Merge pull request 'statistics' (#61) from statistics into master

Reviewed-on: http://git.plannaplan.pl/y0rune/frontend/pulls/61
Reviewed-by: Maciej <glowackimaciej97@gmail.com>

src/contexts/CoursesProvider.tsx

@@ -125,6 +125,7 @@ export const CoursesProvider = ({ children }: CoursesProviderProps) => {
     const courseToBasket: Basket = {
       name: course.name,
       id: course.id,
+      symbol: course.symbol,
       classes: course.classes !== undefined ? course.classes[0] : undefined,
       lecture: course.lectures !== undefined ? course.lectures[0] : undefined,
     };

src/types/index.ts

@@ -28,6 +28,7 @@ export interface Group {
 export interface Course {
   id: number;
   name: string;
+  symbol:string;
   lectures?: Array<Group>;
   classes?: Array<Group>;
 }