update elements and fix some bugs

lib/src/prism/plugins/show-language/prism-show-language.min.js

-!function(){if(self.Prism){var e={csharp:"C#",cpp:"C++"};Prism.hooks.add("before-highlight",function(a){var t=a.element.parentNode;if(t&&/pre/i.test(t.nodeName)){var i=e[a.language]||a.language;t.setAttribute("data-language",i)}})}}();
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var e={css:"CSS",clike:"C-like",javascript:"JavaScript",abap:"ABAP",actionscript:"ActionScript",apacheconf:"Apache Configuration",apl:"APL",applescript:"AppleScript",aspnet:"ASP.NET (C#)",autoit:"AutoIt",autohotkey:"AutoHotkey",basic:"BASIC",csharp:"C#",cpp:"C++",coffeescript:"CoffeeScript","css-extras":"CSS Extras",fsharp:"F#",glsl:"GLSL",http:"HTTP",inform7:"Inform 7",latex:"LaTeX",lolcode:"LOLCODE",matlab:"MATLAB",mel:"MEL",nasm:"NASM",nginx:"nginx",nsis:"NSIS",objectivec:"Objective-C",ocaml:"OCaml",php:"PHP","php-extras":"PHP Extras",powershell:"PowerShell",jsx:"React JSX",rest:"reST (reStructuredText)",sas:"SAS",sass:"Sass (Sass)",scss:"Sass (Scss)",sql:"SQL",typescript:"TypeScript",vhdl:"VHDL",vim:"vim",wiki:"Wiki markup",yaml:"YAML"};Prism.hooks.add("before-highlight",function(a){var t=a.element.parentNode;if(t&&/pre/i.test(t.nodeName)){var s=e[a.language]||a.language.substring(0,1).toUpperCase()+a.language.substring(1);t.setAttribute("data-language",s);var i,r,l=t.previousSibling;l&&/\s*\bprism-show-language\b\s*/.test(l.className)&&l.firstChild&&/\s*\bprism-show-language-label\b\s*/.test(l.firstChild.className)?(r=l.firstChild,r.getAttribute("data-language")!==s&&(r.setAttribute("data-language",s),r.innerHTML=s)):(i=document.createElement("div"),r=document.createElement("div"),r.className="prism-show-language-label",r.setAttribute("data-language",s),r.innerHTML=s,i.className="prism-show-language",i.appendChild(r),t.parentNode.insertBefore(i,t))}})}}();