chore(deps): update dependency numpy to v1.19.0 [(#4137)](GoogleCloudPlatform/python-docs-samples#4137)

Author: renovate-bot

samples/snippets/classify_text/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-language==1.3.0
-numpy==1.18.5
+numpy==1.19.0