Bump @angular/core from 4.4.6 to 5.2.9 in /frontend

[dependabot-preview]

Bumps @angular/core from 4.4.6 to 5.2.9.

Changelog

Sourced from angular/core's changelog.

5.2.9 (2018-03-14)

Bug Fixes

• platform-server: add styles to elements correctly (#22527) (fc6dfc2)
• router: correct over-encoding of URL fragment (#22687) (86517f2)

6.0.0-beta.7 (2018-03-07)

Bug Fixes

• bazel: fixes for ng_package on Windows (#22597) (4c40812)
• compiler: allow tree-shakeable injectables to depend on string tokens (#22376) (dd53447)
• router: fix URL serialization so special characters are only encoded where needed (#22337) (fa974c7), closes #10280

5.2.8 (2018-03-07)

Bug Fixes

• platform-server: generate correct stylings for camel case names (#22263) (de02a7a), closes #19235
• router: don't mutate route configs (#22358) (8f0a064), closes #22203
• router: fix URL serialization so special characters are only encoded where needed (#22337) (789a47e), closes #10280
• upgrade: correctly destroy nested downgraded component (#22400) (4aef9de), closes #22392
• upgrade: correctly handle = bindings in [[**angular**](https://github.com/angular)](https://github.com/angular)/upgrade (#22167) (6638390)
• upgrade: fix empty transclusion content with AngularJS@>=1.5.8 (#22167) (a9a0e27), closes #22175

6.0.0-beta.6 (2018-02-28)

Bug Fixes

• animations: only use the WA-polyfill alongside AnimationBuilder (#22143) (b2f366b), closes #17496
• animations: report correct totalTime value even during noOp animations (#22225) (e1bf067)
• bazel: ng_package includes transitive .d.ts and flatModuleMetadata (#22499) (aabe16c), closes #22419
• common: correct mapping of Observable methods (#20518) (2639b4b), closes #20516
• common: then and else template might be set to null (#22298) (8115edc)
• compiler-cli: add missing entry point to package, update tsickle (#22295) (28ac244)
• core: export inject() from [angular](https://github.com/angular)/core (#22389) (f8749bf), closes #22388
• core: properly handle function without prototype in reflector (#22284) (a7ebf5a), closes #19978
  ... (truncated)

Commits

• 5298b2b docs: add changelog for 5.2.9
• 25ae886 release: cut the 5.2.9 release
• fc6dfc2 fix(platform-server): add styles to elements correctly (#22527)
• c0670ef docs(aio): add ng-japan 2018 to events (#22750)
• fe96caf fix(aio): constrain error logging to improve reporting (#22713)
• ad674da docs: testing - highlight dispatchEvent (#22726)
• 86517f2 fix(router): correct over-encoding of URL fragment (#22687)
• 6d9a4f8 docs: refactor revert() and call to lifecylce hook, edit doc to changes (#22094)
• a1efc27 ci: double our cores on CircleCI (#22641)
• 3112320 docs: add HeroService to code tabs and fix headers (#22373)
• Additional commits viewable in compare view

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