Update to NPM version

ProjectSourceCode/node_modules/es-abstract/2015/ToInt8.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var ToUint8 = require('./ToUint8');
+
+// https://262.ecma-international.org/6.0/#sec-toint8
+
+module.exports = function ToInt8(argument) {
+	var int8bit = ToUint8(argument);
+	return int8bit >= 0x80 ? int8bit - 0x100 : int8bit;
+};