Merge (zotify-dev#157)

Force track_number to be 2 digit values

Author: shinji257

zotify/track.py

@@ -171,7 +171,7 @@ def download_track(mode: str, track_id: str, extra_keys=None, disable_progressba
         output_template = output_template.replace("{song_name}", fix_filename(name))
         output_template = output_template.replace("{release_year}", fix_filename(release_year))
         output_template = output_template.replace("{disc_number}", fix_filename(disc_number))
-        output_template = output_template.replace("{track_number}", fix_filename(track_number))
+        output_template = output_template.replace("{track_number}",'{:02d}'.format(int(fix_filename(track_number))))
         output_template = output_template.replace("{id}", fix_filename(scraped_song_id))
         output_template = output_template.replace("{track_id}", fix_filename(track_id))
         output_template = output_template.replace("{ext}", ext)