chore: cleanup some deprecated APIs (#1160)

BREAKING CHANGE:
@bazel/typescript and @bazel/karma no longer have a defs.bzl file. Use
index.bzl instead.

The @yarn workspace is no longer created. Use @nodejs//:yarn instead.

Fixes #1144

examples/angular/WORKSPACE

diff --git a/examples/angular/WORKSPACE b/examples/angular/WORKSPACE
index 6694a18..397ec3e 100644
--- a/examples/angular/WORKSPACE
+++ b/examples/angular/WORKSPACE
@@ -79,7 +79,7 @@
 browser_repositories()
 
 # Setup the rules_typescript tooolchain
-load("@npm_bazel_typescript//:defs.bzl", "ts_setup_workspace")
+load("@npm_bazel_typescript//:index.bzl", "ts_setup_workspace")
 
 ts_setup_workspace()