Update runtime files
diff --git a/runtime/syntax/liquid.vim b/runtime/syntax/liquid.vim
index 295a917..966b60f 100644
--- a/runtime/syntax/liquid.vim
+++ b/runtime/syntax/liquid.vim
@@ -2,7 +2,7 @@
 " Language:     Liquid
 " Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:    *.liquid
-" Last Change:	2013 May 30
+" Last Change:	2022 Mar 15
 
 if exists('b:current_syntax')
   finish
@@ -68,10 +68,10 @@
   unlet s:subtype
 endif
 
-syn region  liquidStatement  matchgroup=liquidDelimiter start="{%" end="%}" contains=@liquidStatement containedin=ALLBUT,@liquidExempt keepend
-syn region  liquidExpression matchgroup=liquidDelimiter start="{{" end="}}" contains=@liquidExpression  containedin=ALLBUT,@liquidExempt keepend
-syn region  liquidComment    matchgroup=liquidDelimiter start="{%\s*comment\s*%}" end="{%\s*endcomment\s*%}" contains=liquidTodo,@Spell containedin=ALLBUT,@liquidExempt keepend
-syn region  liquidRaw        matchgroup=liquidDelimiter start="{%\s*raw\s*%}" end="{%\s*endraw\s*%}" contains=TOP,@liquidExempt containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidStatement  matchgroup=liquidDelimiter start="{%-\=" end="-\=%}" contains=@liquidStatement containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidExpression matchgroup=liquidDelimiter start="{{-\=" end="-\=}}" contains=@liquidExpression  containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidComment    matchgroup=liquidDelimiter start="{%-\=\s*comment\s*-\=%}" end="{%-\=\s*endcomment\s*-\=%}" contains=liquidTodo,@Spell containedin=ALLBUT,@liquidExempt keepend
+syn region  liquidRaw        matchgroup=liquidDelimiter start="{%-\=\s*raw\s*-\=%}" end="{%-\=\s*endraw\s*-\=%}" contains=TOP,@liquidExempt containedin=ALLBUT,@liquidExempt keepend
 
 syn cluster liquidExempt contains=liquidStatement,liquidExpression,liquidComment,liquidRaw,@liquidStatement,liquidYamlHead
 syn cluster liquidStatement contains=liquidConditional,liquidRepeat,liquidKeyword,@liquidExpression
@@ -79,11 +79,11 @@
 
 syn keyword liquidKeyword highlight nextgroup=liquidTypeHighlight skipwhite contained
 syn keyword liquidKeyword endhighlight contained
-syn region liquidHighlight start="{%\s*highlight\s\+\w\+\s*%}" end="{% endhighlight %}" keepend
+syn region liquidHighlight start="{%-\=\s*highlight\s\+\w\+\s*-\=%}" end="{%-\= endhighlight -\=%}" keepend
 
 for s:type in g:liquid_highlight_types
   exe 'syn match liquidTypeHighlight "\<'.matchstr(s:type,'[^=]*').'\>" contained'
-  exe 'syn region liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' start="{%\s*highlight\s\+'.matchstr(s:type,'[^=]*').'\s*%}" end="{% endhighlight %}" keepend contains=@liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g')
+  exe 'syn region liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' start="{%-\=\s*highlight\s\+'.matchstr(s:type,'[^=]*').'\s*-\=%}" end="{%-\= endhighlight -\=%}" keepend contains=@liquidHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g')
 endfor
 unlet! s:type
 
@@ -92,18 +92,18 @@
 syn match liquidNumber "-\=\<\d\+\>" contained
 syn match liquidFloat "-\=\<\d\+\>\.\.\@!\%(\d\+\>\)\=" contained
 syn keyword liquidBoolean true false contained
-syn keyword liquidNull null nil contained
+syn keyword liquidNull null nil blank contained
 syn match liquidEmpty "\<empty\>" contained
 
 syn keyword liquidOperator and or not contained
 syn match liquidPipe '|' contained skipwhite nextgroup=liquidFilter
 
-syn keyword liquidFilter date capitalize downcase upcase first last join sort size strip_html strip_newlines newline_to_br replace replace_first remove remove_first truncate truncatewords prepend append minus plus times divided_by contained
+syn keyword liquidFilter date capitalize downcase upcase escape escape_once first last join sort size where uniq strip_html strip_newlines newline_to_br replace replace_first remove remove_first slice split strip truncate truncatewords prepend append url_encode url_decode abs at_most at_least ceil divided_by floor minus plus round times modulo contained
 
 syn keyword liquidConditional if elsif else endif unless endunless case when endcase ifchanged endifchanged contained
-syn keyword liquidRepeat      for endfor tablerow endtablerow in contained
-syn match   liquidRepeat      "\%({%\s*\)\@<=empty\>" contained
-syn keyword liquidKeyword     assign cycle include with contained
+syn keyword liquidRepeat      for endfor tablerow endtablerow in break continue limit offset reversed contained
+syn match   liquidRepeat      "\%({%-\=\s*\)\@<=empty\>" contained
+syn keyword liquidKeyword     assign capture endcapture increasement decreasement cycle include with render contained
 
 syn keyword liquidForloop forloop nextgroup=liquidForloopDot contained
 syn match liquidForloopDot "\." nextgroup=liquidForloopAttribute contained