Improve jsClassMethodDefinition matches

Currently in a class definition, you can actually have a method called
`get`.  However with our match of `get` `set` and `static` as keywords,
we broke the ability to properly support those method names.  This
should fix those cases.

Author: amadeus

syntax/javascript.vim

@@ -221,7 +221,7 @@ syntax match   jsArrowFuncArgs  /([^()]*)\s*\(=>\)\@=/ skipempty skipwhite conta
 
 syntax keyword jsClassKeywords extends class contained
 syntax match   jsClassNoise /\./ contained
-syntax keyword jsClassMethodDefinitions get set static contained nextgroup=jsFuncName skipwhite skipempty
+syntax match   jsClassMethodDefinitions /\%(get\|set\|static\)\%( \k\+\)\@=/ contained nextgroup=jsFuncName skipwhite skipempty
 syntax match   jsClassDefinition /\<class\>\%( [a-zA-Z_$][0-9a-zA-Z_$ \n.]*\)*/  contains=jsClassKeywords,jsClassNoise nextgroup=jsClassBlock skipwhite skipempty
 
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