Bump sentencepiece from 0.2.0 to 0.2.1

Bumps [sentencepiece](https://github.com/google/sentencepiece) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/google/sentencepiece/releases)
- [Commits](google/sentencepiece@v0.2.0...v0.2.1)

---
updated-dependencies:
- dependency-name: sentencepiece
  dependency-version: 0.2.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-sentencepiece==0.2.0
+sentencepiece==0.2.1
 gensim==4.3.2
 numpy
 scipy==1.10.1

setup.py

@@ -20,7 +20,7 @@
     ],
     python_requires=">=3.6",
     install_requires=[
-        "sentencepiece==0.2.0",
+        "sentencepiece==0.2.1",
         "gensim==4.3.2",
         "nltk",
         "numpy",