As the keyring dependency is only used by jirashell, have it be part …

…of the cli extras requirement.

Signed-off-by: David Black <dblack@atlassian.com>

setup.cfg

@@ -54,7 +54,6 @@ setup_requires =
     setuptools_scm_git_archive >= 1.0
 install_requires =
     defusedxml
-    keyring
     packaging
     requests-oauthlib>=1.1.0
     requests>=2.10.0
@@ -64,6 +63,7 @@ install_requires =
 [options.extras_require]
 cli =
     ipython>=4.0.0
+    keyring
 docs =
     Sphinx>=2.2.0
     sphinx_rtd_theme>=0.4.3