fix: reolve typeof operator return string

HerrCai0907 · HerrCai0907 · commit 854d34bcd450 · 2022-06-27T16:57:23.000+08:00
diff --git a/src/resolver.ts b/src/resolver.ts
@@ -1778,6 +1778,9 @@ export class Resolver extends DiagnosticEmitter {
         }
         return null;
       }
+      case Token.TYPEOF: {
+        return this.program.stringInstance.type;
+      }
       default: assert(false);
     }
     return null;

Original file line number	Diff line number	Diff line change
`@@ -1778,6 +1778,9 @@ export class Resolver extends DiagnosticEmitter {`
`1778`	`1778`	`}`
`1779`	`1779`	`return null;`
`1780`	`1780`	`}`
	`1781`	`+ case Token.TYPEOF: {`
	`1782`	`+ return this.program.stringInstance.type;`
	`1783`	`+ }`
`1781`	`1784`	`default: assert(false);`
`1782`	`1785`	`}`
`1783`	`1786`	`return null;`