atom-multiline-bracket
Split the enclosed contents of {}, (), and {} over multiple lines in atom.
Use ctrl-alt-m to split a matching pair of {}, (), or {} in the current line of the cursor.
This tool supports one match on a single line only (for now). For multiple cursors, it will take the most recently added cursor as the target.

Configuration
Last Trailing Comma
You can enable or disable (default: enabled) the addition of a trailing comma at the last item:
const {
foo,
bar,
baz,
qux, <--
} = this.props