Fix undefined "end_year"

Author: danielwerg

src/imdb.ts

@@ -437,7 +437,7 @@ export class TVShow extends Movie {
  */
  constructor(obj: OmdbTvshow, opts: MovieOpts) {
  super(obj);
- const years = this._yearData.split("-");
+ const years = this._yearData.split(/[–-]/);
  this.start_year = parseInt(years[0], 10);
  this.end_year = parseInt(years[1], 10) ? parseInt(years[1], 10) : undefined;
  this.totalseasons = parseInt(obj.totalSeasons, 10);