chore(deps): update dependency numpy to v1.19.4 (#53)

Co-authored-by: Dina Graves Portman <dinagraves@google.com>

Author: renovate-bot

packages/google-cloud-language/samples/snippets/classify_text/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-language==2.0.0
-numpy==1.19.2
+numpy==1.19.4