build(deps): update sentencepiece requirement from <=0.1.97,>=0.1.95 to >=0.1.95,<=0.1.99 in /requirements

[dependabot[bot]]

Updates the requirements on sentencepiece to permit the latest version.

Release notes

Sourced from sentencepiece's releases.

v0.1.99

Major changes

N/A

New features

N/A

Bug fixes & minor changes

• [ALL] Fixes the NaN issues in unigram model training: google/sentencepiece#851
• [ALL] Fixes the bug in unigram loss computation: google/sentencepiece#628
• [ALL] Fixes the minor bug in BPE token extraction algorithm: google/sentencepiece#318
• [ALL] Increase the number of maximum threads from 128 to 1024. google/sentencepiece#857

Commits

• 3863f76 increases the max number of threads
• 25b64fc Fix the test error on windows
• bb0b610 Fix the ULM training bugs
• ba44ab1 Fix bugs in the handling of duplicated bigrams
• 69d34c7 prepare for v0.1.99
• d9a2b21 Fix bugs the seed score computation.
• 518c57c build wheel from sdist for testing
• fabfe30 build wheel from sdist for testing
• d6e597b build wheel from sdist for testing
• f2884a1 test loacl sdist build on github actions
• Additional commits viewable in compare view

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[codecov[bot]]

Codecov Report

Merging #1631 (9b6f577) into master (1d871c1) will increase coverage by 0%. The diff coverage is n/a.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1631 +/- ## ====================================== Coverage 85% 85% ====================================== Files 291 291 Lines 12867 12867 ====================================== + Hits 10990 10992 +2 + Misses 1877 1875 -2 ```

[Borda]

Probably drop the one doctest on Win

[Borda]

@dependabot rebase