Add test for numeric literal followed by identifier

test/language/literals/numeric/numeric-followed-by-ident.js

+// Copyright (C) 2018 Mozilla. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-literals-numeric-literals
+description: >
+  NumericLiteral followed by IdentifierStart
+info: |
+  The source character immediately following a NumericLiteral must not be an IdentifierStart or DecimalDigit.
+
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+throw "Test262: This statement should not be evaluated.";
+
+3in []