Add a semicolon to ReturnStatement

Because I used eslint rules
`
"rules": {
"semi": [1, "never"]
}
`

'return do something' is printed as 'return do something ;'

I have found it https://github.com/benjamn/recast/blob/master/lib/printer.ts#L643

`
"parts.push(";");"
`

Would you add optional ?

Start at lib/printer.ts around line 643, where ReturnStatement output adds a semicolon. Review nearby printer behavior and available options, then determine how an optional semicolon setting should affect this output. Done means return statements can be printed without a semicolon for the reported eslint semi-never case.

Written by the indexing model from the issue text.