chore: Upgrade Babel, Jest, Eslint (#1437)

* chore: Upgrade Prettier 1.8 -> 2.0

* chore: Upgrade Babel 6 -> 7

* chore: Upgrade eslint plugins

* chore: Add eslint import/order rules

* chore: Update flow-typed deps

server/services/backlinks.js

@@ -1,8 +1,8 @@
 // @flow
 import { difference } from "lodash";
+import parseDocumentIds from "../../shared/utils/parseDocumentIds";
 import type { DocumentEvent } from "../events";
 import { Document, Revision, Backlink } from "../models";
-import parseDocumentIds from "../../shared/utils/parseDocumentIds";
 import slugify from "../utils/slugify";
 
 export default class Backlinks {

server/services/backlinks.test.js

@@ -1,12 +1,12 @@
 /* eslint-disable flowtype/require-valid-file-annotation */
+import Backlink from "../models/Backlink";
+import { buildDocument } from "../test/factories";
 import { flushdb } from "../test/support";
 import BacklinksService from "./backlinks";
-import { buildDocument } from "../test/factories";
-import Backlink from "../models/Backlink";
 
 const Backlinks = new BacklinksService();
 
-beforeEach(flushdb);
+beforeEach(() => flushdb());
 beforeEach(jest.resetAllMocks);
 
 describe("documents.update", () => {

server/services/index.js

@@ -1,7 +1,7 @@
 // @flow
+import path from "path";
 import debug from "debug";
 import fs from "fs-extra";
-import path from "path";
 
 const log = debug("services");
 const services = {};

server/services/notifications.js

@@ -1,6 +1,6 @@
 // @flow
-import { Op } from "../sequelize";
 import type { DocumentEvent, CollectionEvent, Event } from "../events";
+import mailer from "../mailer";
 import {
   Document,
   Team,
@@ -8,7 +8,7 @@ import {
   User,
   NotificationSetting,
 } from "../models";
-import mailer from "../mailer";
+import { Op } from "../sequelize";
 
 export default class Notifications {
   async on(event: Event) {

server/services/websockets.js

@@ -1,4 +1,6 @@
 // @flow
+import subHours from "date-fns/sub_hours";
+import { socketio } from "../";
 import type { Event } from "../events";
 import {
   Document,
@@ -7,9 +9,7 @@ import {
   CollectionGroup,
   GroupUser,
 } from "../models";
-import { socketio } from "../";
 import { Op } from "../sequelize";
-import subHours from "date-fns/sub_hours";
 
 export default class Websockets {
   async on(event: Event) {