initial commit: scaffolding

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diff --git a/node_modules/date-fns/esm/differenceInCalendarYears/index.js b/node_modules/date-fns/esm/differenceInCalendarYears/index.js
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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+/**
+ * @name differenceInCalendarYears
+ * @category Year Helpers
+ * @summary Get the number of calendar years between the given dates.
+ *
+ * @description
+ * Get the number of calendar years between the given dates.
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @returns {Number} the number of calendar years
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // How many calendar years are between 31 December 2013 and 11 February 2015?
+ * const result = differenceInCalendarYears(
+ *   new Date(2015, 1, 11),
+ *   new Date(2013, 11, 31)
+ * )
+ * //=> 2
+ */
+export default function differenceInCalendarYears(dirtyDateLeft, dirtyDateRight) {
+  requiredArgs(2, arguments);
+  var dateLeft = toDate(dirtyDateLeft);
+  var dateRight = toDate(dirtyDateRight);
+  return dateLeft.getFullYear() - dateRight.getFullYear();
+}
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