Bump httplib2 from 0.11.3 to 0.18.0 in /Gmail_Scraping

Bumps [httplib2](https://github.com/httplib2/httplib2) from 0.11.3 to 0.18.0.
- [Release notes](https://github.com/httplib2/httplib2/releases)
- [Changelog](https://github.com/httplib2/httplib2/blob/master/CHANGELOG)
- [Commits](httplib2/httplib2@v0.11.3...v0.18.0)

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

Author: dependabot[bot]

Gmail_Scraping/requirements.txt

@@ -47,7 +47,7 @@ Flask-JWT-Extended==3.12.1
 Flask-RESTful==0.3.6
 greenlet==0.4.15
 html5lib==1.0.1
-httplib2==0.11.3
+httplib2==0.18.0
 humanfriendly==4.10
 idna==2.6
 idna-ssl==1.0.1