Bump pyjwt from 1.6.4 to 1.7.1

Bumps [pyjwt](https://github.com/jpadilla/pyjwt) from 1.6.4 to 1.7.1.
- [Release notes](https://github.com/jpadilla/pyjwt/releases)
- [Changelog](https://github.com/jpadilla/pyjwt/blob/master/CHANGELOG.md)
- [Commits](jpadilla/pyjwt@1.6.4...1.7.1)

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

homeassistant_cli/package_constraints.txt

@@ -5,7 +5,7 @@ attrs==18.2.0
 bcrypt==3.1.4
 certifi>=2018.04.16
 jinja2>=2.10
-PyJWT==1.6.4
+PyJWT==1.7.1
 cryptography==2.3.1
 pip>=8.0.3
 pytz>=2018.07