Port javascriptreact.vim syntax only. Ref https://github.com/neovim/neovim/issues/13185
Problem: Errors when using javascriptreact. Solution: Use ":runtime" instead of ":source". (closes vim/vim#4875) https://github.com/vim/vim/commit/4fb15c647658b15230c61857c644230a03881904
Problem: Cannot recognize .jsx and .tsx files. Solution: Recognize them as javascriptreact and typescriptreact. (closes vim/vim#4830) https://github.com/vim/vim/commit/92852cee3fcff1dc6ce12387b234634e73267b22