Index: node_modules/postgres-interval/index.js
===================================================================
--- node_modules/postgres-interval/index.js	(revision 62b296460f935ff5cc47a75f6567f97df5a244a7)
+++ node_modules/postgres-interval/index.js	(revision 62b296460f935ff5cc47a75f6567f97df5a244a7)
@@ -0,0 +1,125 @@
+'use strict'
+
+var extend = require('xtend/mutable')
+
+module.exports = PostgresInterval
+
+function PostgresInterval (raw) {
+  if (!(this instanceof PostgresInterval)) {
+    return new PostgresInterval(raw)
+  }
+  extend(this, parse(raw))
+}
+var properties = ['seconds', 'minutes', 'hours', 'days', 'months', 'years']
+PostgresInterval.prototype.toPostgres = function () {
+  var filtered = properties.filter(this.hasOwnProperty, this)
+
+  // In addition to `properties`, we need to account for fractions of seconds.
+  if (this.milliseconds && filtered.indexOf('seconds') < 0) {
+    filtered.push('seconds')
+  }
+
+  if (filtered.length === 0) return '0'
+  return filtered
+    .map(function (property) {
+      var value = this[property] || 0
+
+      // Account for fractional part of seconds,
+      // remove trailing zeroes.
+      if (property === 'seconds' && this.milliseconds) {
+        value = (value + this.milliseconds / 1000).toFixed(6).replace(/\.?0+$/, '')
+      }
+
+      return value + ' ' + property
+    }, this)
+    .join(' ')
+}
+
+var propertiesISOEquivalent = {
+  years: 'Y',
+  months: 'M',
+  days: 'D',
+  hours: 'H',
+  minutes: 'M',
+  seconds: 'S'
+}
+var dateProperties = ['years', 'months', 'days']
+var timeProperties = ['hours', 'minutes', 'seconds']
+// according to ISO 8601
+PostgresInterval.prototype.toISOString = PostgresInterval.prototype.toISO = function () {
+  var datePart = dateProperties
+    .map(buildProperty, this)
+    .join('')
+
+  var timePart = timeProperties
+    .map(buildProperty, this)
+    .join('')
+
+  return 'P' + datePart + 'T' + timePart
+
+  function buildProperty (property) {
+    var value = this[property] || 0
+
+    // Account for fractional part of seconds,
+    // remove trailing zeroes.
+    if (property === 'seconds' && this.milliseconds) {
+      value = (value + this.milliseconds / 1000).toFixed(6).replace(/0+$/, '')
+    }
+
+    return value + propertiesISOEquivalent[property]
+  }
+}
+
+var NUMBER = '([+-]?\\d+)'
+var YEAR = NUMBER + '\\s+years?'
+var MONTH = NUMBER + '\\s+mons?'
+var DAY = NUMBER + '\\s+days?'
+var TIME = '([+-])?([\\d]*):(\\d\\d):(\\d\\d)\\.?(\\d{1,6})?'
+var INTERVAL = new RegExp([YEAR, MONTH, DAY, TIME].map(function (regexString) {
+  return '(' + regexString + ')?'
+})
+  .join('\\s*'))
+
+// Positions of values in regex match
+var positions = {
+  years: 2,
+  months: 4,
+  days: 6,
+  hours: 9,
+  minutes: 10,
+  seconds: 11,
+  milliseconds: 12
+}
+// We can use negative time
+var negatives = ['hours', 'minutes', 'seconds', 'milliseconds']
+
+function parseMilliseconds (fraction) {
+  // add omitted zeroes
+  var microseconds = fraction + '000000'.slice(fraction.length)
+  return parseInt(microseconds, 10) / 1000
+}
+
+function parse (interval) {
+  if (!interval) return {}
+  var matches = INTERVAL.exec(interval)
+  var isNegative = matches[8] === '-'
+  return Object.keys(positions)
+    .reduce(function (parsed, property) {
+      var position = positions[property]
+      var value = matches[position]
+      // no empty string
+      if (!value) return parsed
+      // milliseconds are actually microseconds (up to 6 digits)
+      // with omitted trailing zeroes.
+      value = property === 'milliseconds'
+        ? parseMilliseconds(value)
+        : parseInt(value, 10)
+      // no zeros
+      if (!value) return parsed
+      if (isNegative && ~negatives.indexOf(property)) {
+        value *= -1
+      }
+      parsed[property] = value
+      return parsed
+    }, {})
+}