fix: Update for Csound 6.18.0 (#4974)

Author: nwhetsell

src/mode/csound_orchestra_highlight_rules.js

@@ -368,13 +368,17 @@ var CsoundOrchestraHighlightRules = function(embeddedRulePrefix) {
         "duserrnd",
         "dust",
         "dust2",
+        "elapsedcycles",
+        "elapsedtime",
         "envlpx",
         "envlpxr",
         "ephasor",
         "eqfil",
         "evalstr",
         "event",
         "event_i",
+        "eventcycles",
+        "eventtime",
         "exciter",
         "exitnow",
         "exp",
@@ -1277,6 +1281,7 @@ var CsoundOrchestraHighlightRules = function(embeddedRulePrefix) {
         "seqtime",
         "seqtime2",
         "sequ",
+        "sequstate",
         "serialBegin",
         "serialEnd",
         "serialFlush",