Index: frontend/node_modules/fill-range/index.js
===================================================================
--- frontend/node_modules/fill-range/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/fill-range/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,248 @@
+/*!
+ * fill-range <https://github.com/jonschlinkert/fill-range>
+ *
+ * Copyright (c) 2014-present, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+const util = require('util');
+const toRegexRange = require('to-regex-range');
+
+const isObject = val => val !== null && typeof val === 'object' && !Array.isArray(val);
+
+const transform = toNumber => {
+  return value => toNumber === true ? Number(value) : String(value);
+};
+
+const isValidValue = value => {
+  return typeof value === 'number' || (typeof value === 'string' && value !== '');
+};
+
+const isNumber = num => Number.isInteger(+num);
+
+const zeros = input => {
+  let value = `${input}`;
+  let index = -1;
+  if (value[0] === '-') value = value.slice(1);
+  if (value === '0') return false;
+  while (value[++index] === '0');
+  return index > 0;
+};
+
+const stringify = (start, end, options) => {
+  if (typeof start === 'string' || typeof end === 'string') {
+    return true;
+  }
+  return options.stringify === true;
+};
+
+const pad = (input, maxLength, toNumber) => {
+  if (maxLength > 0) {
+    let dash = input[0] === '-' ? '-' : '';
+    if (dash) input = input.slice(1);
+    input = (dash + input.padStart(dash ? maxLength - 1 : maxLength, '0'));
+  }
+  if (toNumber === false) {
+    return String(input);
+  }
+  return input;
+};
+
+const toMaxLen = (input, maxLength) => {
+  let negative = input[0] === '-' ? '-' : '';
+  if (negative) {
+    input = input.slice(1);
+    maxLength--;
+  }
+  while (input.length < maxLength) input = '0' + input;
+  return negative ? ('-' + input) : input;
+};
+
+const toSequence = (parts, options, maxLen) => {
+  parts.negatives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
+  parts.positives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
+
+  let prefix = options.capture ? '' : '?:';
+  let positives = '';
+  let negatives = '';
+  let result;
+
+  if (parts.positives.length) {
+    positives = parts.positives.map(v => toMaxLen(String(v), maxLen)).join('|');
+  }
+
+  if (parts.negatives.length) {
+    negatives = `-(${prefix}${parts.negatives.map(v => toMaxLen(String(v), maxLen)).join('|')})`;
+  }
+
+  if (positives && negatives) {
+    result = `${positives}|${negatives}`;
+  } else {
+    result = positives || negatives;
+  }
+
+  if (options.wrap) {
+    return `(${prefix}${result})`;
+  }
+
+  return result;
+};
+
+const toRange = (a, b, isNumbers, options) => {
+  if (isNumbers) {
+    return toRegexRange(a, b, { wrap: false, ...options });
+  }
+
+  let start = String.fromCharCode(a);
+  if (a === b) return start;
+
+  let stop = String.fromCharCode(b);
+  return `[${start}-${stop}]`;
+};
+
+const toRegex = (start, end, options) => {
+  if (Array.isArray(start)) {
+    let wrap = options.wrap === true;
+    let prefix = options.capture ? '' : '?:';
+    return wrap ? `(${prefix}${start.join('|')})` : start.join('|');
+  }
+  return toRegexRange(start, end, options);
+};
+
+const rangeError = (...args) => {
+  return new RangeError('Invalid range arguments: ' + util.inspect(...args));
+};
+
+const invalidRange = (start, end, options) => {
+  if (options.strictRanges === true) throw rangeError([start, end]);
+  return [];
+};
+
+const invalidStep = (step, options) => {
+  if (options.strictRanges === true) {
+    throw new TypeError(`Expected step "${step}" to be a number`);
+  }
+  return [];
+};
+
+const fillNumbers = (start, end, step = 1, options = {}) => {
+  let a = Number(start);
+  let b = Number(end);
+
+  if (!Number.isInteger(a) || !Number.isInteger(b)) {
+    if (options.strictRanges === true) throw rangeError([start, end]);
+    return [];
+  }
+
+  // fix negative zero
+  if (a === 0) a = 0;
+  if (b === 0) b = 0;
+
+  let descending = a > b;
+  let startString = String(start);
+  let endString = String(end);
+  let stepString = String(step);
+  step = Math.max(Math.abs(step), 1);
+
+  let padded = zeros(startString) || zeros(endString) || zeros(stepString);
+  let maxLen = padded ? Math.max(startString.length, endString.length, stepString.length) : 0;
+  let toNumber = padded === false && stringify(start, end, options) === false;
+  let format = options.transform || transform(toNumber);
+
+  if (options.toRegex && step === 1) {
+    return toRange(toMaxLen(start, maxLen), toMaxLen(end, maxLen), true, options);
+  }
+
+  let parts = { negatives: [], positives: [] };
+  let push = num => parts[num < 0 ? 'negatives' : 'positives'].push(Math.abs(num));
+  let range = [];
+  let index = 0;
+
+  while (descending ? a >= b : a <= b) {
+    if (options.toRegex === true && step > 1) {
+      push(a);
+    } else {
+      range.push(pad(format(a, index), maxLen, toNumber));
+    }
+    a = descending ? a - step : a + step;
+    index++;
+  }
+
+  if (options.toRegex === true) {
+    return step > 1
+      ? toSequence(parts, options, maxLen)
+      : toRegex(range, null, { wrap: false, ...options });
+  }
+
+  return range;
+};
+
+const fillLetters = (start, end, step = 1, options = {}) => {
+  if ((!isNumber(start) && start.length > 1) || (!isNumber(end) && end.length > 1)) {
+    return invalidRange(start, end, options);
+  }
+
+  let format = options.transform || (val => String.fromCharCode(val));
+  let a = `${start}`.charCodeAt(0);
+  let b = `${end}`.charCodeAt(0);
+
+  let descending = a > b;
+  let min = Math.min(a, b);
+  let max = Math.max(a, b);
+
+  if (options.toRegex && step === 1) {
+    return toRange(min, max, false, options);
+  }
+
+  let range = [];
+  let index = 0;
+
+  while (descending ? a >= b : a <= b) {
+    range.push(format(a, index));
+    a = descending ? a - step : a + step;
+    index++;
+  }
+
+  if (options.toRegex === true) {
+    return toRegex(range, null, { wrap: false, options });
+  }
+
+  return range;
+};
+
+const fill = (start, end, step, options = {}) => {
+  if (end == null && isValidValue(start)) {
+    return [start];
+  }
+
+  if (!isValidValue(start) || !isValidValue(end)) {
+    return invalidRange(start, end, options);
+  }
+
+  if (typeof step === 'function') {
+    return fill(start, end, 1, { transform: step });
+  }
+
+  if (isObject(step)) {
+    return fill(start, end, 0, step);
+  }
+
+  let opts = { ...options };
+  if (opts.capture === true) opts.wrap = true;
+  step = step || opts.step || 1;
+
+  if (!isNumber(step)) {
+    if (step != null && !isObject(step)) return invalidStep(step, opts);
+    return fill(start, end, 1, step);
+  }
+
+  if (isNumber(start) && isNumber(end)) {
+    return fillNumbers(start, end, step, opts);
+  }
+
+  return fillLetters(start, end, Math.max(Math.abs(step), 1), opts);
+};
+
+module.exports = fill;