v0.20.6

What's Changed

• Remove duplicate AudioProcessor code, fix ExtractTTSpectrogram.ipynb by @eginhard in #3230
• Add sentence splitting by @WeberJulian in #3227
• Fix zh bug by @WeberJulian in #3238
• Update versions by @erogol in #3248
• Ensures that only GPT model is in training mode during XTTS GPT training by @Edresson in #3241
• Loosen dependencies and make k_diffusion optional by @erogol in #3249
• Update XTTS v2.0.2 by @erogol in #3249

Full Changelog: v0.20.5...v0.20.6