v3.7.8

Bug fixes

• Scalameta: upgrade to v4.8.3 (#3583) @kitbellew
• TreeOps: skip empty types in defDefReturnType (#3584) @kitbellew
• Router: use template to break before extends (#3581) @kitbellew
• FormatOps: handle if with rewritten braces around (#3578) @kitbellew
• RemoveScala3OptionalBraces: handle infix on rbrace (#3576) @kitbellew
• FormatOps: refactor getting else chain (#3579) @kitbellew

Miscellaneous

• Router: extract template to handle extends (#3582) @kitbellew
• FormatOps: use getLastTokenOpt, add getHeadToken (#3577) @kitbellew
• Move match as infix lhs test to all OptionalBraces (#3575) @kitbellew