#344 Only include STJ for Net Standard 2#367

thompson-tomo wants to merge 3 commits intodoghappy:masterdoghappy/socket.io-client-csharp:masterfrom

thompson-tomo:chore/#344_ExternaliseSTJthompson-tomo/socket.io-client-csharp:chore/#344_ExternaliseSTJCopy head branch name to clipboard