git config --global push.default simple

When push.default is set to 'matching', git will push local branches
to the remote branches that already exist with the same name.

Since Git 2.0, Git defaults to the more conservative 'simple'
behavior, which only pushes the current branch to the corresponding
remote branch that 'git pull' uses to update the current branch.

See 'git help config' and search for 'push.default' for further information.
(the 'simple' mode was ... (205 more, please see e.stderr)

/home/travis/build/Charcoal-SE/userscripts/node_modules/xo/cli.js:4
const debug = require('debug')('xo');
^^^^^
SyntaxError: Use of const in strict mode.