pipenv: explicit regex dependency

regex, unlike stdlib 're' module, has unicode support.

I couldn't get pipenv to lock after adding this dependency, even though
Pipfile.lock already includes regex as a sub-dependency of something
else.

1 files changed, 1 insertions, 0 deletions

diff --git a/Pipfile b/Pipfile
index c3606c8..39dedee 100644
--- a/Pipfile
+++ b/Pipfile
@@ -23,6 +23,7 @@ pydantic = "*"
 tokenizers = "*"
 spacy = "*"
 nltk = "*"
+regex = "*"
 
 [requires]
 python_version = "3.7"