build: fix and document the symlinks scripts for Windows

Closes angular#10213

docs(changelog): change log and package.json to rc4

Closes angular#9727

8c01008 chore: fix public api

8c01008 chore: fix public api

chore(release): 2.0.0-rc.3

dafd9d9 fix(compiler): make `InjectorCompiler` injectable

dafd9d9 fix(compiler): make `InjectorCompiler` injectable

9d5918e refactor(core): add `MapInjector.createFactory` and add `fact…

…ories` to `MapInjector`.

9d5918e refactor(core): add `MapInjector.createFactory` and add `fact…

…ories` to `MapInjector`.

43133b5 fix(types): fix usage of `onError` in Dart promises.