Bump flask from 0.12.3 to 1.0 in /rest-api-deploy/toy_project_v2/toy

Bumps [flask](https://github.com/pallets/flask) from 0.12.3 to 1.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](pallets/flask@0.12.3...1.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

rest-api-deploy/toy_project_v2/toy/requirements.txt

@@ -1,7 +1,7 @@
 eventlet==0.20.1
 gunicorn==19.7.0
 jieba==0.38
-Flask==0.12.3
+Flask==1.0
 requests>=2.20.0
 PyYAML
 python-logstash==0.4.6