vim-patch:8.1.1937: errors when using javascriptreact #10885

Problem:    Errors when using javascriptreact.
Solution:   Use ":runtime" instead of ":source". (closes vim/vim#4875)
https://github.com/vim/vim/commit/4fb15c647658b15230c61857c644230a03881904

runtime/ftplugin/javascriptreact.vim

@@ -1,2 +1,2 @@
 " Placeholder for backwards compatilibity: .jsx used to stand for JavaScript.
-source %:h/javascript.vim
+runtime! ftplugin/javascript.vim