Bump pip from 9.0.1 to 19.2 in /cli/integration

Bumps [pip](https://github.com/pypa/pip) from 9.0.1 to 19.2.
- [Release notes](https://github.com/pypa/pip/releases)
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@9.0.1...19.2)

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

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

cli/integration/requirements.txt

@@ -1,4 +1,4 @@
-pip==9.0.1; python_version >= '3.6'
+pip==19.2; python_version >= '3.6'
 pytest>=4.3.0,<=5.3.5
 pytest-xdist>=1.20.1,<2.0.0
 pyyaml>=3.13