build: Upgrade to TypeScript 2.5 (#20175)

- update to TypeScript 2.5
- point the 2.4 typings test at the previous typescript version, so we
  don't break it accidentally
- widen the peerDeps from Angular packages that depend on TypeScript
- update to latest TypeScript 2.5 compatible Bazel rules
- move .bazelrc to tools/bazel.rc per https://docs.bazel.build/versions/master/best-practices.html#bazelrc

PR Close #20175

WORKSPACE

@@ -5,8 +5,7 @@ load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 git_repository(
     name = "build_bazel_rules_nodejs",
     remote = "https://github.com/bazelbuild/rules_nodejs.git",
-    # TODO(alexeagle): use the correct tag here.
-    commit = "2c6243df53fd33fdab283ebdd01582e4eb815db8",
+    commit = "0.2.1",
 )
 
 load("@build_bazel_rules_nodejs//:defs.bzl", "node_repositories")