Bump flask from 0.12.2 to 1.0

Bumps [flask](https://github.com/pallets/flask) from 0.12.2 to 1.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](pallets/flask@0.12.2...1.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

dashboard-api/requirements.txt

@@ -1,5 +1,5 @@
 click==6.7
-Flask==0.12.2
+Flask==1.0
 itsdangerous==0.24
 Jinja2==2.9.6
 MarkupSafe==1.0