update dev dependencies

dist/showdown.js

@@ -970,7 +970,7 @@ showdown.helper.padEnd = function padEnd (str, targetLength, padString) {
  * POLYFILLS
  */
 // use this instead of builtin is undefined for IE8 compatibility
-if (typeof(console) === 'undefined') {
+if (typeof console === 'undefined') {
   console = {
     warn: function (msg) {
       'use strict';
@@ -2225,10 +2225,10 @@ showdown.Converter = function (converterOptions) {
        */
       setConvFlavor = setFlavor,
 
-    /**
-     * Metadata of the document
-     * @type {{parsed: {}, raw: string, format: string}}
-     */
+      /**
+       * Metadata of the document
+       * @type {{parsed: {}, raw: string, format: string}}
+       */
       metadata = {
         parsed: {},
         raw: '',
@@ -2287,7 +2287,7 @@ showdown.Converter = function (converterOptions) {
           'Please inform the developer that the extension should be updated!');
         legacyExtensionLoading(showdown.extensions[ext], ext);
         return;
-      // END LEGACY SUPPORT CODE
+        // END LEGACY SUPPORT CODE
 
       } else if (!showdown.helper.isUndefined(extensions[ext])) {
         ext = extensions[ext];
@@ -2849,7 +2849,7 @@ showdown.subParser('anchors', function (text, options, globals) {
 
   // normal cases
   text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
-                      writeAnchorTag);
+    writeAnchorTag);
 
   // handle reference-style shortcuts: [link text]
   // These must come last in case you've also got [link test][1]
@@ -3105,7 +3105,7 @@ showdown.subParser('codeSpans', function (text, options, globals) {
 
   text = globals.converter._dispatch('codeSpans.before', text, options, globals);
 
-  if (typeof(text) === 'undefined') {
+  if (typeof text === 'undefined') {
     text = '';
   }
   text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
@@ -3525,7 +3525,7 @@ showdown.subParser('hashHTMLBlocks', function (text, options, globals) {
 
       //2. Split the text in that position
       var subTexts = showdown.helper.splitAtIndex(text, opTagPos),
-      //3. Match recursively
+          //3. Match recursively
           newSubText1 = showdown.helper.replaceRecursiveRegExp(subTexts[1], repFunc, patLeft, patRight, 'im');
 
       // prevent an infinite loop
@@ -3644,13 +3644,13 @@ showdown.subParser('headers', function (text, options, globals) {
 
   var headerLevelStart = (isNaN(parseInt(options.headerLevelStart))) ? 1 : parseInt(options.headerLevelStart),
 
-  // Set text-style headers:
-  //	Header 1
-  //	========
-  //
-  //	Header 2
-  //	--------
-  //
+      // Set text-style headers:
+      //	Header 1
+      //	========
+      //
+      //	Header 2
+      //	--------
+      //
       setextRegexH1 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n={2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n=+[ \t]*\n+/gm,
       setextRegexH2 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n-{2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n-+[ \t]*\n+/gm;
 
@@ -4451,7 +4451,7 @@ showdown.subParser('tables', function (text, options, globals) {
   }
 
   var tableRgx       = /^ {0,3}\|?.+\|.+\n {0,3}\|?[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*:?[ \t]*(?:[-=]){2,}[\s\S]+?(?:\n\n|¨0)/gm,
-    //singeColTblRgx = /^ {0,3}\|.+\|\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n(?: {0,3}\|.+\|\n)+(?:\n\n|¨0)/gm;
+      //singeColTblRgx = /^ {0,3}\|.+\|\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n(?: {0,3}\|.+\|\n)+(?:\n\n|¨0)/gm;
       singeColTblRgx = /^ {0,3}\|.+\|[ \t]*\n {0,3}\|[ \t]*:?[ \t]*(?:[-=]){2,}[ \t]*:?[ \t]*\|[ \t]*\n( {0,3}\|.+\|[ \t]*\n)*(?:\n|¨0)/gm;
 
   function parseStyles (sLine) {

package.json

@@ -48,7 +48,7 @@
     "grunt-conventional-changelog": "^6.1.0",
     "grunt-conventional-github-releaser": "^1.0.0",
     "grunt-endline": "^0.6.1",
-    "grunt-eslint": "^19.0.0",
+    "grunt-eslint": "^22.0.0",
     "grunt-simple-mocha": "^0.4.0",
     "jsdom": "^13.0.0",
     "load-grunt-tasks": "^3.2.0",