1.9.1

Package updates.
No breaking changes expected.

• eslint-plugin-es 2.0.0 => 3.0.0
• eslint-plugin-import 2.19.1 => 2.20.0
• eslint-plugin-jest 23.1.1 => 23.6.0
• eslint-plugin-node 10.0.0 => 11.0.0