Bump httplib2 from 0.14.0 to 0.19.0

Bumps [httplib2](https://github.com/httplib2/httplib2) from 0.14.0 to 0.19.0.
- [Release notes](https://github.com/httplib2/httplib2/releases)
- [Changelog](https://github.com/httplib2/httplib2/blob/master/CHANGELOG)
- [Commits](httplib2/httplib2@v0.14.0...v0.19.0)

---
updated-dependencies:
- dependency-name: httplib2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

generated.txt

@@ -35,7 +35,7 @@ filelock==3.0.12
 Flask==1.1.1
 fluent==0.10.0
 future==0.18.2
-httplib2==0.14.0
+httplib2==0.19.0
 idna==2.8
 ifaddr==0.1.6
 importlib-metadata==1.5.0