Implement ranges::starts_with and ranges::ends_with - #1997

Implement ranges::starts_with and ranges::ends_with#1997

Stephan T. Lavavej (StephanTLavavej) merged 27 commits into

microsoft:mainmicrosoft/STL:mainfrom

miscco:P1659-ranges-starts_withmiscco/STL:P1659-ranges-starts_withCopy head branch name to clipboard