feat:1、修复无数据时报错的问题。

2、新增自定义代码着色格式
3、新增自动加载配置文件

static/editor.md/lib/highlight/languages/subunit.js

@@ -0,0 +1,39 @@
+/*
+Language: SubUnit
+Author: Sergey Bronnikov <sergeyb@bronevichok.ru>
+Website: https://bronevichok.ru/
+*/
+
+function(hljs) {
+  var DETAILS = {
+    className: 'string',
+    begin: '\\[\n(multipart)?', end: '\\]\n'
+  };
+  var TIME = {
+    className: 'string',
+    begin: '\\d{4}-\\d{2}-\\d{2}(\\s+)\\d{2}:\\d{2}:\\d{2}\.\\d+Z'
+  };
+  var PROGRESSVALUE = {
+    className: 'string',
+    begin: '(\\+|-)\\d+'
+  };
+  var KEYWORDS = {
+    className: 'keyword',
+    relevance: 10,
+    variants: [
+      { begin: '^(test|testing|success|successful|failure|error|skip|xfail|uxsuccess)(:?)\\s+(test)?' },
+      { begin: '^progress(:?)(\\s+)?(pop|push)?' },
+      { begin: '^tags:' },
+      { begin: '^time:' }
+    ],
+  };
+  return {
+    case_insensitive: true,
+    contains: [
+      DETAILS,
+      TIME,
+      PROGRESSVALUE,
+      KEYWORDS
+    ]
+  };
+}