es5-ext vulnerable to Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`

Impact Passing functions with very long names or complex default argument names into functioncopy orfunctiontoStringTokens may put script to stall Patches Fixed with https://github.com/medikoo/es5-ext/commit/3551cdd7b2db08b1632841f819d008757d28e8e2 and...