Update estlintrc.json schema with support for `ignorePatterns` (#870)
Update estlintrc.json schema with support for `ignorePatterns` (#870)

With ESLint v6.7.0 came a new `ignorePatterns` option for config files and the current `eslintrc` schema does not have support for this new option. This PR should update the `eslintrc` schema with support for `ignorePatterns`.
schemastore/schemastore,schemastore/schemastore