[5.7] Add API to enable or disable bare slash regex parsing#453

ahoppen merged 1 commit intoswiftlang:release/5.7swiftlang/swift-syntax:release/5.7from

ahoppen:pr-5.7/enable-disable-bare-slashahoppen/swift-syntax:pr-5.7/enable-disable-bare-slashCopy head branch name to clipboard