fix: match return-await behavior to airbnb-base (#279)

Author: lotap

lib/shared.js

@@ -208,7 +208,7 @@ module.exports = {
     // Replace Airbnb 'no-return-await' rule with '@typescript-eslint' version
     // https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/return-await.md
     'no-return-await': 'off',
-    '@typescript-eslint/return-await': baseBestPracticesRules['no-return-await'],
+    '@typescript-eslint/return-await': [baseBestPracticesRules['no-return-await'], 'never'],
 
     // Replace Airbnb 'space-infix-ops' rule with '@typescript-eslint' version
     // https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/space-infix-ops.md