Inflection library

Inflection library

ReplaCy uses LemmInflect inflection module underhood.

Speed and accuracy benchmark (copied from the Lemminflect repo):

| Package          | Verb  |  Noun | ADJ/ADV | Overall |  Speed  |
|----------------------------------------------------------------|
| LemmInflect      | 96.1% | 95.4% |  93.9%  |  95.6%  | 42.0 uS |
| CLiPS/pattern.en | 93.6% | 91.1% |   0.0%  |  n/a    |  3.0 uS |
| Stanford CoreNLP | 87.6% | 93.1% |   0.0%  |  n/a    |  n/a    |
| spaCy            | 79.4% | 88.9% |  60.5%  |  84.7%  |  5.0 uS |
| NLTK             | 53.3% | 52.2% |  53.3%  |  52.6%  | 13.0 uS |
|----------------------------------------------------------------|