Keyman: Added new keywords (#3401)

Author: mcdurdin

components/prism-keyman.js

@@ -28,7 +28,7 @@ Prism.languages.keyman = {
 		alias: 'keyword'
 	},
 	'structural-keyword': {
-		pattern: /\b(?:ansi|begin|group|match|nomatch|unicode|using keys)\b/i,
+		pattern: /\b(?:ansi|begin|group|match|newcontext|nomatch|postkeystroke|readonly|unicode|using keys)\b/i,
 		alias: 'keyword'
 	},
 

components/prism-keyman.min.js

@@ -5,6 +5,9 @@ group
 using keys
 match
 nomatch
+newcontext
+postkeystroke
+readonly
 
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@@ -15,7 +18,10 @@ nomatch
 	["structural-keyword", "group"],
 	["structural-keyword", "using keys"],
 	["structural-keyword", "match"],
-	["structural-keyword", "nomatch"]
+	["structural-keyword", "nomatch"],
+	["structural-keyword", "newcontext"],
+	["structural-keyword", "postkeystroke"],
+	["structural-keyword", "readonly"]
 ]
 
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