update to higlight.js 8.4

vendor/assets/javascripts/highlight_js/languages/bash.js

@@ -2,6 +2,7 @@
 Language: Bash
 Author: vah <vahtenberg@gmail.com>
 Contributrors: Benjamin Pannell <contact@sierrasoftworks.com>
+Category: common
 */
 
 function(hljs) {
@@ -9,7 +10,7 @@ function(hljs) {
     className: 'variable',
     variants: [
       {begin: /\$[\w\d#@][\w\d_]*/},
-      {begin: /\$\{(.*?)\}/}
+      {begin: /\$\{(.*?)}/}
     ]
   };
   var QUOTE_STRING = {
@@ -35,13 +36,26 @@ function(hljs) {
     lexemes: /-?[a-z\.]+/,
     keywords: {
       keyword:
-        'if then else elif fi for break continue while in do done exit return set '+
-        'declare case esac export exec',
+        'if then else elif fi for while in do done case esac function',
       literal:
         'true false',
       built_in:
-        'printf echo read cd pwd pushd popd dirs let eval unset typeset readonly '+
-        'getopts source shopt caller type hash bind help sudo',
+        // Shell built-ins
+        // http://www.gnu.org/software/bash/manual/html_node/Shell-Builtin-Commands.html
+        'break cd continue eval exec exit export getopts hash pwd readonly return shift test times ' +
+        'trap umask unset ' +
+        // Bash built-ins
+        'alias bind builtin caller command declare echo enable help let local logout mapfile printf ' +
+        'read readarray source type typeset ulimit unalias ' +
+        // Shell modifiers
+        'set shopt ' +
+        // Zsh built-ins
+        'autoload bg bindkey bye cap chdir clone comparguments compcall compctl compdescribe compfiles ' +
+        'compgroups compquote comptags comptry compvalues dirs disable disown echotc echoti emulate ' +
+        'fc fg float functions getcap getln history integer jobs kill limit log noglob popd print ' +
+        'pushd pushln rehash sched setcap setopt stat suspend ttyctl unfunction unhash unlimit ' +
+        'unsetopt vared wait whence where which zcompile zformat zftp zle zmodload zparseopts zprof ' +
+        'zpty zregexparse zsocket zstyle ztcp',
       operator:
         '-ne -eq -lt -gt -f -d -e -s -l -a' // relevance booster
     },