Upgrade dependencies and fix typo

[benoit74]

Fix #204 Fix #202

Changes

• Upgrade all dependencies, including zimscraperlib 3.4.0 which brings in the migration to VP9 instead of VP8
• Adopt bootstrap v1.0.2 (fix codecov report generation)
• Fix typo in input argument for playlist mode

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 5.05%. Comparing base (e0ab3d5) to head (6614d4b). Report is 20 commits behind head on main.

Files	Patch %	Lines
src/ted2zim/multi/scraper.py	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #205 +/- ## ======================================== + Coverage 0.00% 5.05% +5.05% ======================================== Files 7 8 +1 Lines 1055 1088 +33 Branches 228 237 +9 ======================================== + Hits 0 55 +55 + Misses 1055 1032 -23 - Partials 0 1 +1 ```

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