initial commit: scaffolding

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diff --git a/node_modules/date-fns/esm/_lib/getTimezoneOffsetInMilliseconds/index.js b/node_modules/date-fns/esm/_lib/getTimezoneOffsetInMilliseconds/index.js
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+/**
+ * Google Chrome as of 67.0.3396.87 introduced timezones with offset that includes seconds.
+ * They usually appear for dates that denote time before the timezones were introduced
+ * (e.g. for 'Europe/Prague' timezone the offset is GMT+00:57:44 before 1 October 1891
+ * and GMT+01:00:00 after that date)
+ *
+ * Date#getTimezoneOffset returns the offset in minutes and would return 57 for the example above,
+ * which would lead to incorrect calculations.
+ *
+ * This function returns the timezone offset in milliseconds that takes seconds in account.
+ */
+export default function getTimezoneOffsetInMilliseconds(date) {
+  var utcDate = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds(), date.getMilliseconds()));
+  utcDate.setUTCFullYear(date.getFullYear());
+  return date.getTime() - utcDate.getTime();
+}
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