fix: turn off typescript 'no-undef' rule per docs (#144)

Author: OrkhanAlikhanov

packages/eslint-config-typescript/index.js

@@ -10,6 +10,9 @@ module.exports = {
     '@typescript-eslint/no-unused-vars': ['error', { args: 'all', argsIgnorePattern: '^_' }],
     // Per the docs, the root no-unused-vars should be disabled:
     // https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/no-unused-vars.md
-    'no-unused-vars': 'off'
+    'no-unused-vars': 'off',
+
+    // https://github.com/typescript-eslint/typescript-eslint/blob/1cf9243/docs/getting-started/linting/FAQ.md#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+    'no-undef': 'off'
   }
 }