Bump httplib2 in /drake_stuff/diff_ik_fixed_point_issue

Bumps [httplib2](https://github.com/httplib2/httplib2) from 0.9.2 to 0.19.0.
- [Release notes](https://github.com/httplib2/httplib2/releases)
- [Changelog](https://github.com/httplib2/httplib2/blob/master/CHANGELOG)
- [Commits](httplib2/httplib2@0.9.2...v0.19.0)

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

drake_stuff/diff_ik_fixed_point_issue/requirements.freeze.txt

@@ -67,7 +67,7 @@ entrypoints==0.3
 flake8==3.5.0
 h5py==2.7.1
 html5lib==0.999999999
-httplib2==0.9.2
+httplib2==0.19.0
 hyperlink==17.3.1
 idna==2.10
 ifcfg==0.18