Missing react-a11y converter: react-a11y-lang

[JoshuaKGoldberg]

💥 Missing Converter

• tslint-to-eslint-config version: 2.0.1
• typescript-eslint version: 4.9.1

TSLint Rule Name

react-a11y-lang

Per https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/ROADMAP.md, the equivalent rules are now jsx-a11y/html-has-lang and jsx-a11y/lang.

Package Source

https://github.com/teamairship/tslint-react-a11y