2.31.3
- Added support for Kattis problems in sessions (thanks @user202729)
- Added support for SSOIER's extended problem set
- Fixed the parsing of Kattis sample cases with whitespace at the end of lines
- Fixed the parsing of Codeforces contests where some problem URLs redirect to a PDF file containing the problem statement
- Fixed the parsing of CodeChef sample cases where the sample cases are displayed as text nodes