Updated test case.

Author: DanielRosenwasser

tests/cases/compiler/warnExperimentalBigIntLiteral.ts

@@ -1,7 +1,8 @@
-// @target: esnext
+// @target: es3
 
 const normalNumber = 123; // should not error
 let bigintType: bigint; // should not error
 let bigintLiteralType: 123n; // should not error when used as type
 let bigintNegativeLiteralType: -123n; // should not error when used as type
-const bigintNumber = 123n * 0b1111n + 0o444n * 0x7fn; // each literal should error
+const bigintNumber = 123n * 0b1111n + 0o444n * 0x7fn; // each literal should error
+