Add using Keyword to JavaScript (#1215)

`using` is a new Keyword in JavaScript. See
[MDM](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/using)
for more information.

Author: JakobDev

lexers/embedded/javascript.xml

@@ -133,7 +133,7 @@
         <token type="KeywordDeclaration"/>
         <push state="slashstartsregex"/>
       </rule>
-      <rule pattern="(abstract|async|await|boolean|byte|char|class|const|debugger|double|enum|export|extends|final|float|goto|implements|import|int|interface|long|native|package|private|protected|public|short|static|super|synchronized|throws|transient|volatile)\b">
+      <rule pattern="(abstract|async|await|boolean|byte|char|class|const|debugger|double|enum|export|extends|final|float|goto|implements|import|int|interface|long|native|package|private|protected|public|short|static|super|synchronized|throws|transient|using|volatile)\b">
         <token type="KeywordReserved"/>
       </rule>
       <rule pattern="(true|false|null|NaN|Infinity|undefined)\b">

lexers/embedded/typescript.xml

@@ -226,7 +226,7 @@
         <push state="slashstartsregex" />
       </rule>
       <rule
-        pattern="(abstract|async|boolean|class|const|debugger|enum|export|extends|from|get|global|goto|implements|import|interface|namespace|package|private|protected|public|readonly|require|set|static|super|type)\b"
+        pattern="(abstract|async|boolean|class|const|debugger|enum|export|extends|from|get|global|goto|implements|import|interface|namespace|package|private|protected|public|readonly|require|set|static|super|type|using)\b"
       >
         <token type="KeywordReserved" />
       </rule>

lexers/testdata/javascript.actual

@@ -4,3 +4,5 @@ const filePath = String.raw`C:\Development\profile\aboutme.html`;
 
 let n = 0x21 + 1_000;
 let n2 = 1e3;
+
+using resource = new Resource();

lexers/testdata/javascript.expected

@@ -59,5 +59,16 @@
   {"type":"Text","value":" "},
   {"type":"LiteralNumberFloat","value":"1e3"},
   {"type":"Punctuation","value":";"},
+  {"type":"Text","value":"\n\n"},
+  {"type":"KeywordReserved","value":"using"},
+  {"type":"Text","value":" "},
+  {"type":"NameOther","value":"resource"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Keyword","value":"new"},
+  {"type":"Text","value":" "},
+  {"type":"NameOther","value":"Resource"},
+  {"type":"Punctuation","value":"();"},
   {"type":"Text","value":"\n"}
 ]

lexers/testdata/typescript.actual

@@ -1,5 +1,7 @@
 const moduleName = modules.map();
 
+using resource = new Resource();
+
 declare module "fs" {}
 declare module "@custom/plugin" {}
 declare module "../../compiler/types" {}
@@ -20,4 +22,4 @@ type FirstChar<K extends string> = K extends `${infer X}${infer _}`
   : never
 type SChar = FirstChar<"stuff">
 
-export { TestComponent }
+export { TestComponent }

lexers/testdata/typescript.expected

@@ -10,6 +10,17 @@
   {"type":"NameOther","value":"map"},
   {"type":"Punctuation","value":"();"},
   {"type":"Text","value":"\n\n"},
+  {"type":"KeywordReserved","value":"using"},
+  {"type":"Text","value":" "},
+  {"type":"NameOther","value":"resource"},
+  {"type":"Text","value":" "},
+  {"type":"Operator","value":"="},
+  {"type":"Text","value":" "},
+  {"type":"Keyword","value":"new"},
+  {"type":"Text","value":" "},
+  {"type":"NameOther","value":"Resource"},
+  {"type":"Punctuation","value":"();"},
+  {"type":"Text","value":"\n\n"},
   {"type":"KeywordReserved","value":"declare"},
   {"type":"Text","value":" "},
   {"type":"KeywordReserved","value":"module"},
@@ -188,5 +199,6 @@
   {"type":"Text","value":" "},
   {"type":"NameOther","value":"TestComponent"},
   {"type":"Text","value":" "},
-  {"type":"Punctuation","value":"}"}
+  {"type":"Punctuation","value":"}"},
+  {"type":"Text","value":"\n"}
 ]