nltk download to tests

Makefile

@@ -11,4 +11,4 @@ lint lint_diff:
 	poetry run ruff .
 
 test:
-	poetry run pytest -vv -n auto --cov=semantic_router --cov-report=term-missing --cov-report=xml --cov-fail-under=100
+	poetry run pytest -vv -n 20 --cov=semantic_router --cov-report=term-missing --cov-report=xml --cov-fail-under=100

coverage.xml

 <?xml version="1.0" ?>
-<coverage version="7.3.2" timestamp="1702457433568" lines-valid="311" lines-covered="311" line-rate="1" branches-covered="0" branches-valid="0" branch-rate="0" complexity="0">
+<coverage version="7.3.2" timestamp="1702458696684" lines-valid="311" lines-covered="311" line-rate="1" branches-covered="0" branches-valid="0" branch-rate="0" complexity="0">
 	<!-- Generated by coverage.py: https://coverage.readthedocs.io/en/7.3.2 -->
 	<!-- Based on https://raw.githubusercontent.com/cobertura/web/master/htdocs/xml/coverage-04.dtd -->
 	<sources>

tests/unit/test_layer.py

 import pytest
+import nltk
 
 from semantic_router.encoders import BaseEncoder, CohereEncoder, OpenAIEncoder
 from semantic_router.layer import (
@@ -9,6 +10,8 @@ from semantic_router.layer import (
 # Replace with the actual module name
 from semantic_router.schema import Decision
 
+nltk.download("punkt")
+
 
 def mock_encoder_call(utterances):
     # Define a mapping of utterances to return values