feat: add instance properties to AcornJsxParser

Author: brettz9

index.d.ts

@@ -26,6 +26,14 @@ export class AcornJsxParser extends acorn.Parser {
     tokContexts: typeof tokContexts
   };
 
+  pos: number;
+  start: number;
+  input: string;
+  lineStart: number;
+  type: acorn.TokenType;
+  exprAllowed: boolean;
+  context: acorn.TokContext[];
+
   jsx_readToken(): string;
   jsx_readNewLine(normalizeCRLF: boolean): void;
   jsx_readString(quote: number): void;