Bump flask from 0.12.4 to 1.0.2 (#228)

Bumps [flask](https://github.com/pallets/flask) from 0.12.4 to 1.0.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/docs/changelog.rst)
- [Commits](pallets/flask@0.12.4...1.0.2)

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

requirements.txt

@@ -7,7 +7,7 @@ bokeh==1.0.4
 boto3==1.9.86
 psycopg2==2.7.3.2
 SQLAlchemy==1.2.17
-Flask==0.12.4
+Flask==1.0.2
 Flask-Cors==3.0.3
 gensim==3.7.1
 lxml==4.3.0