Refactored session management system to handle cookie and crumbs better.

Added fixes for #167, #166, #160.

.github/workflows/test.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
  build:
- runs-on: ubuntu-20.04
+ runs-on: ubuntu-latest
  strategy:
  matrix:
  python-version: ["3.8", "3.9", "3.10", "3.11"]