Bump nltk from 2.0.4 to 3.4.5
Bump nltk from 2.0.4 to 3.4.5

Bumps [nltk](https://github.com/nltk/nltk) from 2.0.4 to 3.4.5.
- [Release notes](https://github.com/nltk/nltk/releases)
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](https://github.com/nltk/nltk/compare/2.0.4...3.4.5)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
avinassh/gre-classics