Add import/no-restricted-paths to imports rules

This rule was added by 1.10.0. I am setting it to be disabled because it
is very project-specific, so it doesn't make sense to enable it here.

https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-restricted-paths.md

I found the sections of this file a little confusing, so I didn't know
where to put it. I think it would be better to simply alphabetize the
rules but I'll leave that for another time.

packages/eslint-config-airbnb-base/rules/imports.js

@@ -124,5 +124,9 @@ module.exports = {
     // Require modules with a single export to use a default export
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/prefer-default-export.md
     'import/prefer-default-export': 2,
+
+    // Restrict which files can be imported in a given folder
+    // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-restricted-paths.md
+    'import/no-restricted-paths': 0,
   },
 };