(core) Faster builds all around.

Summary:
Building:
- Builds no longer wait for tsc for either client, server, or test targets. All use esbuild which is very fast.
- Build still runs tsc, but only to report errors. This may be turned off with `SKIP_TSC=1` env var.
- Grist-core continues to build using tsc.
- Esbuild requires ES6 module semantics. Typescript's esModuleInterop is turned
  on, so that tsc accepts and enforces correct usage.
- Client-side code is watched and bundled by webpack as before (using esbuild-loader)

Code changes:
- Imports must now follow ES6 semantics: `import * as X from ...` produces a
  module object; to import functions or class instances, use `import X from ...`.
- Everything is now built with isolatedModules flag. Some exports were updated for it.

Packages:
- Upgraded browserify dependency, and related packages (used for the distribution-building step).
- Building the distribution now uses esbuild's minification. babel-minify is no longer used.

Test Plan: Should have no behavior changes, existing tests should pass, and docker image should build too.

Reviewers: georgegevoian

Reviewed By: georgegevoian

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3506

test/server/Comm.ts

@@ -4,7 +4,7 @@ import {assert} from 'chai';
 import * as http from 'http';
 import {AddressInfo, Server, Socket} from 'net';
 import * as sinon from 'sinon';
-import * as WebSocket from 'ws';
+import WebSocket from 'ws';
 import * as path from 'path';
 import * as tmp from 'tmp';
 
@@ -80,6 +80,9 @@ describe('Comm', function() {
   beforeEach(function() {
     // Silence console messages from client-side Comm.ts.
     if (!process.env.VERBOSE) {
+      // TODO: This no longer works, now that 'log' is a more proper "module" object rather than
+      // an arbitrary JS object. Also used in a couple other tests where logs are no longer
+      // silenced.
       sandbox.stub(log, 'debug');
     }
   });

test/server/customUtil.ts

@@ -1,6 +1,6 @@
 import {getAppRoot} from 'app/server/lib/places';
 import {fromCallback, listenPromise} from 'app/server/lib/serverUtils';
-import * as express from 'express';
+import express from 'express';
 import * as http from 'http';
 import {AddressInfo, Socket} from 'net';
 import * as path from 'path';

test/server/gristClient.ts

@@ -2,7 +2,7 @@ import { DocAction } from 'app/common/DocActions';
 import { FlexServer } from 'app/server/lib/FlexServer';
 import axios from 'axios';
 import pick = require('lodash/pick');
-import * as WebSocket from 'ws';
+import WebSocket from 'ws';
 
 interface GristRequest {
   reqId: number;

test/server/lib/Authorizer.ts

@@ -10,7 +10,7 @@ import {configForUser, getGristConfig} from 'test/gen-server/testUtils';
 import {createDocTools} from 'test/server/docTools';
 import {openClient} from 'test/server/gristClient';
 import * as testUtils from 'test/server/testUtils';
-import * as uuidv4 from 'uuid/v4';
+import uuidv4 from 'uuid/v4';
 
 let serverUrl: string;
 let server: FlexServer;

test/server/lib/DocApi.ts

@@ -11,7 +11,7 @@ import {
   docPeriodicApiUsageKey,
   getDocApiUsageKeysToIncr
 } from 'app/server/lib/DocApi';
-import * as log from 'app/server/lib/log';
+import log from 'app/server/lib/log';
 import {exitPromise} from 'app/server/lib/serverUtils';
 import {connectTestingHooks, TestingHooksClient} from 'app/server/lib/TestingHooks';
 import axios, {AxiosResponse} from 'axios';
@@ -19,10 +19,10 @@ import {delay} from 'bluebird';
 import * as bodyParser from 'body-parser';
 import {assert} from 'chai';
 import {ChildProcess, execFileSync, spawn} from 'child_process';
-import * as FormData from 'form-data';
+import FormData from 'form-data';
 import * as fse from 'fs-extra';
 import * as _ from 'lodash';
-import * as LRUCache from 'lru-cache';
+import LRUCache from 'lru-cache';
 import * as moment from 'moment';
 import fetch from 'node-fetch';
 import {tmpdir} from 'os';

test/server/testUtils.ts

@@ -11,9 +11,7 @@
 /* global before, after */
 
 import * as _ from 'underscore';
-import * as chai from 'chai';
 import { assert } from 'chai';
-import * as chaiAsPromised from 'chai-as-promised';
 import * as path from 'path';
 import * as fse from 'fs-extra';
 import clone = require('lodash/clone');
@@ -22,11 +20,9 @@ import * as winston from 'winston';
 import { serialize } from 'winston/lib/winston/common';
 
 import * as docUtils from 'app/server/lib/docUtils';
-import * as log from 'app/server/lib/log';
+import log from 'app/server/lib/log';
 import { getAppRoot } from 'app/server/lib/places';
 
-chai.use(chaiAsPromised);
-
 /**
  * Creates a temporary file with the given contents.
  * @param {String} content. Data to store in the file.