es-x/no-regexp-lookbehind-assertions 
disallow RegExp lookbehind assertions
- ✅ The following configurations enable this rule: no-new-in-es2018, restrict-to-es3, restrict-to-es5, restrict-to-es2015, restrict-to-es2016, and restrict-to-es2017
 
This rule reports ES2018 RegExp lookbehind assertions as errors.
💡 Examples 
⛔ Examples of incorrect code for this rule:
🚀 Version 
This rule was introduced in eslint-plugin-es v1.0.0.