initial commit: scaffolding

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diff --git a/node_modules/date-fns/setISOWeekYear/index.js b/node_modules/date-fns/setISOWeekYear/index.js
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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = setISOWeekYear;
+var _index = _interopRequireDefault(require("../_lib/toInteger/index.js"));
+var _index2 = _interopRequireDefault(require("../toDate/index.js"));
+var _index3 = _interopRequireDefault(require("../startOfISOWeekYear/index.js"));
+var _index4 = _interopRequireDefault(require("../differenceInCalendarDays/index.js"));
+var _index5 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+/**
+ * @name setISOWeekYear
+ * @category ISO Week-Numbering Year Helpers
+ * @summary Set the ISO week-numbering year to the given date.
+ *
+ * @description
+ * Set the ISO week-numbering year to the given date,
+ * saving the week number and the weekday number.
+ *
+ * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
+ *
+ * @param {Date|Number} date - the date to be changed
+ * @param {Number} isoWeekYear - the ISO week-numbering year of the new date
+ * @returns {Date} the new date with the ISO week-numbering year set
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // Set ISO week-numbering year 2007 to 29 December 2008:
+ * const result = setISOWeekYear(new Date(2008, 11, 29), 2007)
+ * //=> Mon Jan 01 2007 00:00:00
+ */
+function setISOWeekYear(dirtyDate, dirtyISOWeekYear) {
+  (0, _index5.default)(2, arguments);
+  var date = (0, _index2.default)(dirtyDate);
+  var isoWeekYear = (0, _index.default)(dirtyISOWeekYear);
+  var diff = (0, _index4.default)(date, (0, _index3.default)(date));
+  var fourthOfJanuary = new Date(0);
+  fourthOfJanuary.setFullYear(isoWeekYear, 0, 4);
+  fourthOfJanuary.setHours(0, 0, 0, 0);
+  date = (0, _index3.default)(fourthOfJanuary);
+  date.setDate(date.getDate() + diff);
+  return date;
+}
+module.exports = exports.default;
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