feat: Add missing mod.ts files in std (#3509)

std/archive/tar.ts:
- Remove FileReader.
- Remove FileWriter.

std/encoding/csv.ts:
- ExtendedParseOptions -> ParseOptions
- HeaderOption -> HeaderOptions
- ParseOptions -> ReadOptions
- readAll() -> readMatrix()

std/encoding/yaml.ts:
- DumpOptions -> StringifyOptions

std/fmt/colors.ts:
- getEnabled() -> getColorEnabled()
- setEnabled() -> setColorEnabled()

std/testing/mod.ts:
- Re-export sibling modules.

2 files changed, 12 insertions, 2 deletions

diff --git a/std/testing/README.md b/std/testing/README.md
index 8d02f9d79..afaf76b86 100644
--- a/std/testing/README.md
+++ b/std/testing/README.md
@@ -48,8 +48,11 @@ Asserts are exposed in `testing/asserts.ts` module.
 Basic usage:
 
 ```ts
-import { runTests, test } from "https://deno.land/std/testing/mod.ts";
-import { assertEquals } from "https://deno.land/std/testing/asserts.ts";
+import {
+  assertEquals,
+  runTests,
+  test
+} from "https://deno.land/std/testing/mod.ts";
 
 test({
   name: "testing example",
diff --git a/std/testing/mod.ts b/std/testing/mod.ts
index 0d5d2702a..06a1df958 100644
--- a/std/testing/mod.ts
+++ b/std/testing/mod.ts
@@ -1,5 +1,12 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 
+export * from "./asserts.ts";
+export * from "./bench.ts";
+import diff from "./diff.ts";
+export { diff };
+export * from "./format.ts";
+export * from "./runner.ts";
+
 import {
   bgRed,
   white,