Index: frontend/node_modules/human-signals/CHANGELOG.md
===================================================================
--- frontend/node_modules/human-signals/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/human-signals/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,11 @@
+# 2.1.0
+
+## TypeScript types
+
+- Add [TypeScript definitions](src/main.d.ts)
+
+# 2.0.0
+
+## Breaking changes
+
+- Minimal supported Node.js version is now `10.17.0`
Index: frontend/node_modules/human-signals/LICENSE
===================================================================
--- frontend/node_modules/human-signals/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/human-signals/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,201 @@
+                                 Apache License
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Index: frontend/node_modules/human-signals/README.md
===================================================================
--- frontend/node_modules/human-signals/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/human-signals/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,165 @@
+[![Codecov](https://img.shields.io/codecov/c/github/ehmicky/human-signals.svg?label=tested&logo=codecov)](https://codecov.io/gh/ehmicky/human-signals)
+[![Travis](https://img.shields.io/badge/cross-platform-4cc61e.svg?logo=travis)](https://travis-ci.org/ehmicky/human-signals)
+[![Node](https://img.shields.io/node/v/human-signals.svg?logo=node.js)](https://www.npmjs.com/package/human-signals)
+[![Gitter](https://img.shields.io/gitter/room/ehmicky/human-signals.svg?logo=gitter)](https://gitter.im/ehmicky/human-signals)
+[![Twitter](https://img.shields.io/badge/%E2%80%8B-twitter-4cc61e.svg?logo=twitter)](https://twitter.com/intent/follow?screen_name=ehmicky)
+[![Medium](https://img.shields.io/badge/%E2%80%8B-medium-4cc61e.svg?logo=medium)](https://medium.com/@ehmicky)
+
+Human-friendly process signals.
+
+This is a map of known process signals with some information about each signal.
+
+Unlike
+[`os.constants.signals`](https://nodejs.org/api/os.html#os_signal_constants)
+this includes:
+
+- human-friendly [descriptions](#description)
+- [default actions](#action), including whether they [can be prevented](#forced)
+- whether the signal is [supported](#supported) by the current OS
+
+# Example
+
+```js
+const { signalsByName, signalsByNumber } = require('human-signals')
+
+console.log(signalsByName.SIGINT)
+// {
+//   name: 'SIGINT',
+//   number: 2,
+//   description: 'User interruption with CTRL-C',
+//   supported: true,
+//   action: 'terminate',
+//   forced: false,
+//   standard: 'ansi'
+// }
+
+console.log(signalsByNumber[8])
+// {
+//   name: 'SIGFPE',
+//   number: 8,
+//   description: 'Floating point arithmetic error',
+//   supported: true,
+//   action: 'core',
+//   forced: false,
+//   standard: 'ansi'
+// }
+```
+
+# Install
+
+```bash
+npm install human-signals
+```
+
+# Usage
+
+## signalsByName
+
+_Type_: `object`
+
+Object whose keys are signal [names](#name) and values are
+[signal objects](#signal).
+
+## signalsByNumber
+
+_Type_: `object`
+
+Object whose keys are signal [numbers](#number) and values are
+[signal objects](#signal).
+
+## signal
+
+_Type_: `object`
+
+Signal object with the following properties.
+
+### name
+
+_Type_: `string`
+
+Standard name of the signal, for example `'SIGINT'`.
+
+### number
+
+_Type_: `number`
+
+Code number of the signal, for example `2`. While most `number` are
+cross-platform, some are different between different OS.
+
+### description
+
+_Type_: `string`
+
+Human-friendly description for the signal, for example
+`'User interruption with CTRL-C'`.
+
+### supported
+
+_Type_: `boolean`
+
+Whether the current OS can handle this signal in Node.js using
+[`process.on(name, handler)`](https://nodejs.org/api/process.html#process_signal_events).
+
+The list of supported signals
+[is OS-specific](https://github.com/ehmicky/cross-platform-node-guide/blob/master/docs/6_networking_ipc/signals.md#cross-platform-signals).
+
+### action
+
+_Type_: `string`\
+_Enum_: `'terminate'`, `'core'`, `'ignore'`, `'pause'`, `'unpause'`
+
+What is the default action for this signal when it is not handled.
+
+### forced
+
+_Type_: `boolean`
+
+Whether the signal's default action cannot be prevented. This is `true` for
+`SIGTERM`, `SIGKILL` and `SIGSTOP`.
+
+### standard
+
+_Type_: `string`\
+_Enum_: `'ansi'`, `'posix'`, `'bsd'`, `'systemv'`, `'other'`
+
+Which standard defined that signal.
+
+# Support
+
+If you found a bug or would like a new feature, _don't hesitate_ to
+[submit an issue on GitHub](../../issues).
+
+For other questions, feel free to
+[chat with us on Gitter](https://gitter.im/ehmicky/human-signals).
+
+Everyone is welcome regardless of personal background. We enforce a
+[Code of conduct](CODE_OF_CONDUCT.md) in order to promote a positive and
+inclusive environment.
+
+# Contributing
+
+This project was made with ❤️. The simplest way to give back is by starring and
+sharing it online.
+
+If the documentation is unclear or has a typo, please click on the page's `Edit`
+button (pencil icon) and suggest a correction.
+
+If you would like to help us fix a bug or add a new feature, please check our
+[guidelines](CONTRIBUTING.md). Pull requests are welcome!
+
+Thanks go to our wonderful contributors:
+
+<!-- ALL-CONTRIBUTORS-LIST:START -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://twitter.com/ehmicky"><img src="https://avatars2.githubusercontent.com/u/8136211?v=4" width="100px;" alt=""/><br /><sub><b>ehmicky</b></sub></a><br /><a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Code">💻</a> <a href="#design-ehmicky" title="Design">🎨</a> <a href="#ideas-ehmicky" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Documentation">📖</a></td>
+    <td align="center"><a href="http://www.electrovir.com"><img src="https://avatars0.githubusercontent.com/u/1205860?v=4" width="100px;" alt=""/><br /><sub><b>electrovir</b></sub></a><br /><a href="https://github.com/ehmicky/human-signals/commits?author=electrovir" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-enable -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
Index: frontend/node_modules/human-signals/package.json
===================================================================
--- frontend/node_modules/human-signals/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/human-signals/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,64 @@
+{
+  "name": "human-signals",
+  "version": "2.1.0",
+  "main": "build/src/main.js",
+  "files": [
+    "build/src",
+    "!~"
+  ],
+  "scripts": {
+    "test": "gulp test"
+  },
+  "husky": {
+    "hooks": {
+      "pre-push": "gulp check --full"
+    }
+  },
+  "description": "Human-friendly process signals",
+  "keywords": [
+    "signal",
+    "signals",
+    "handlers",
+    "error-handling",
+    "errors",
+    "interrupts",
+    "sigterm",
+    "sigint",
+    "irq",
+    "process",
+    "exit",
+    "exit-code",
+    "status",
+    "operating-system",
+    "es6",
+    "javascript",
+    "linux",
+    "macos",
+    "windows",
+    "nodejs"
+  ],
+  "license": "Apache-2.0",
+  "homepage": "https://git.io/JeluP",
+  "repository": "ehmicky/human-signals",
+  "bugs": {
+    "url": "https://github.com/ehmicky/human-signals/issues"
+  },
+  "author": "ehmicky <ehmicky@gmail.com> (https://github.com/ehmicky)",
+  "directories": {
+    "lib": "src",
+    "test": "test"
+  },
+  "types": "build/src/main.d.ts",
+  "dependencies": {},
+  "devDependencies": {
+    "@ehmicky/dev-tasks": "^0.31.9",
+    "ajv": "^6.12.0",
+    "ava": "^3.5.0",
+    "gulp": "^4.0.2",
+    "husky": "^4.2.3",
+    "test-each": "^2.0.0"
+  },
+  "engines": {
+    "node": ">=10.17.0"
+  }
+}
