Refactor snapshot build (#2825)

Instead of using core/snapshot_creator.rs, instead two crates are
introduced which allow building the snapshot during build.rs.

Rollup is removed and replaced with our own bundler. This removes
the Node build dependency. Modules in //js now use Deno-style imports
with file extensions, rather than Node style extensionless imports.

This improves incremental build time when changes are made to //js files
by about 40 seconds.

1 files changed, 7 insertions, 7 deletions

diff --git a/js/workers.ts b/js/workers.ts
index 7bcbe6279..36c2aa50b 100644
--- a/js/workers.ts
+++ b/js/workers.ts
@@ -1,12 +1,12 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import * as dispatch from "./dispatch";
-import { sendAsync, sendSync } from "./dispatch_json";
-import { log } from "./util";
-import { TextDecoder, TextEncoder } from "./text_encoding";
-import { window } from "./window";
-import { blobURLMap } from "./url";
-import { blobBytesWeakMap } from "./blob";
+import * as dispatch from "./dispatch.ts";
+import { sendAsync, sendSync } from "./dispatch_json.ts";
+import { log } from "./util.ts";
+import { TextDecoder, TextEncoder } from "./text_encoding.ts";
+import { window } from "./window.ts";
+import { blobURLMap } from "./url.ts";
+import { blobBytesWeakMap } from "./blob.ts";
 
 const encoder = new TextEncoder();
 const decoder = new TextDecoder();