feat: add --no-check option (#6456)

This commit adds a "--no-check" option to following subcommands:
- "deno cache"
- "deno info"
- "deno run"
- "deno test"

The "--no-check" options allows to skip type checking step and instead 
directly transpiles TS sources to JS sources. 

This solution uses `ts.transpileModule()` API and is just an interim
solution before implementing it fully in Rust.

cli/js/web/event.ts

@@ -1,6 +1,6 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
-import * as domTypes from "./dom_types.d.ts";
+import type * as domTypes from "./dom_types.d.ts";
 import { defineEnumerableProps, requiredArguments } from "./util.ts";
 import { assert } from "../util.ts";