chore: update v2.0.0-alpha.44 changelog 

chore(changelog): update changelog to alpha.42 

chore(changelog): update changelog to alpha.41 

chore(changelog): update change log to alpha-40 

fix(docs): export bootstrap in core.ts but not in core.dart 

test(router): add tests for router.d.ts Closes angular#3282

refactor(ElementBinderBuilder): remove unused code Closes angular#3326

refactor(di): removed @parent BREAKING CHANGE The @parent annotation has been removed. Use @ancestor instead. @parent was used to enforce a particular DOM structure (e.g., a pane component is a direct child of the tabs component). DI is not the right mechanism to do it. We should enforce it using schema instead.

chore(package.json): bump version to 2.0.0-alpha.31 

chore(packaging): bump version to 2.0.0-alpha.30