Update: Declare ES6 collections (Map, Set, WeakMap, WeakSet) as built-in globals (fixes #1189)
Fix: mergeConfigs ensures the plugins property exists (fixes #1191).
Merge pull request #1190 from mzgol/es6-collections

Update: Declare ES6 collections (Map, Set, WeakMap, WeakSet) as built-in globals (fixes #1189)
Merge pull request #1192 from lo1tuma/fix-merge-configs

Fix: mergeConfigs ensures the plugins property exists (fixes #1191).
Docs: Spell checking and one extra closing curly in code example
Merge pull request #1198 from paazmaya/doc-spellchecks

Docs: Spell checking and one extra closing curly in code example
Merge branch 'master' of https://github.com/eslint/eslint into new-plugin-cli