Bump flask from 0.12.2 to 1.0 in /Gmail_Scraping

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] <support@github.com>

Author: dependabot[bot]

Gmail_Scraping/requirements.txt

@@ -39,7 +39,7 @@ ekphrasis==0.4.10
 email-validator==1.0.3
 en-core-web-sm==2.1.0
 eventlet==0.24.1
-Flask==0.12.2
+Flask==1.0
 Flask-Bcrypt==0.7.1
 Flask-Cors==3.0.7
 Flask-DebugToolbar==0.10.1