2.0.0

No changes to the default config; only changes to sub-configs.

• BREAKING: Set ecmaVersion: 2017 in parserOptions for problems/node8 sub-config (#2)
• Add problems/node10 sub-config; includes all rules from problems/node8, plus:
  • Sets ecmaVersion: 2018
  • Turns on prefer-object-spread rule as an error