initial commit: scaffolding

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diff --git a/node_modules/date-fns/esm/eachYearOfInterval/index.js b/node_modules/date-fns/esm/eachYearOfInterval/index.js
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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+/**
+ * @name eachYearOfInterval
+ * @category Interval Helpers
+ * @summary Return the array of yearly timestamps within the specified time interval.
+ *
+ * @description
+ * Return the array of yearly timestamps within the specified time interval.
+ *
+ * @param {Interval} interval - the interval. See [Interval]{@link https://date-fns.org/docs/Interval}
+ * @returns {Date[]} the array with starts of yearly timestamps from the month of the interval start to the month of the interval end
+ * @throws {TypeError} 1 argument required
+ * @throws {RangeError} The start of an interval cannot be after its end
+ * @throws {RangeError} Date in interval cannot be `Invalid Date`
+ *
+ * @example
+ * // Each year between 6 February 2014 and 10 August 2017:
+ * const result = eachYearOfInterval({
+ *   start: new Date(2014, 1, 6),
+ *   end: new Date(2017, 7, 10)
+ * })
+ * //=> [
+ * //   Wed Jan 01 2014 00:00:00,
+ * //   Thu Jan 01 2015 00:00:00,
+ * //   Fri Jan 01 2016 00:00:00,
+ * //   Sun Jan 01 2017 00:00:00
+ * // ]
+ */
+export default function eachYearOfInterval(dirtyInterval) {
+  requiredArgs(1, arguments);
+  var interval = dirtyInterval || {};
+  var startDate = toDate(interval.start);
+  var endDate = toDate(interval.end);
+  var endTime = endDate.getTime();
+
+  // Throw an exception if start date is after end date or if any date is `Invalid Date`
+  if (!(startDate.getTime() <= endTime)) {
+    throw new RangeError('Invalid interval');
+  }
+  var dates = [];
+  var currentDate = startDate;
+  currentDate.setHours(0, 0, 0, 0);
+  currentDate.setMonth(0, 1);
+  while (currentDate.getTime() <= endTime) {
+    dates.push(toDate(currentDate));
+    currentDate.setFullYear(currentDate.getFullYear() + 1);
+  }
+  return dates;
+}
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