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, 3 insertions, 3 deletions

diff --git a/js/mixins/dom_iterable.ts b/js/mixins/dom_iterable.ts
index 97e8133ec..bbd1905ce 100644
--- a/js/mixins/dom_iterable.ts
+++ b/js/mixins/dom_iterable.ts
@@ -1,8 +1,8 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
-import { DomIterable } from "../dom_types";
-import { window } from "../window";
-import { requiredArguments } from "../util";
+import { DomIterable } from "../dom_types.ts";
+import { window } from "../window.ts";
+import { requiredArguments } from "../util.ts";
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 type Constructor<T = {}> = new (...args: any[]) => T;