refactor(ng:6.0): support angular 6.0

[vthinkxie]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: close #1395

What is the new behavior?

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

[vthinkxie]

blocked by angular/devkit#866 now.

[codecov]

Codecov Report

Merging #1404 into master will decrease coverage by 1.04%.
The diff coverage is 99.59%.

@@            Coverage Diff             @@
##           master    #1404      +/-   ##
==========================================
- Coverage   97.03%   95.99%   -1.05%     
==========================================
  Files         224      466     +242     
  Lines        9766    10948    +1182     
  Branches     1340     1448     +108     
==========================================
+ Hits         9476    10509    +1033     
- Misses         42      124      +82     
- Partials      248      315      +67

Impacted Files	Coverage Δ
...mponents/input-number/nz-input-number.component.ts	98.99% <ø> (ø)	⬆️
...ents/time-picker/nz-time-picker-panel.component.ts	86.32% <ø> (ø)	⬆️
components/steps/nz-steps.component.ts	96.72% <ø> (ø)	⬆️
...uto-complete/nz-autocomplete-optgroup.component.ts	100% <ø> (ø)	⬆️
components/slider/nz-slider-track.component.ts	100% <ø> (ø)	⬆️
components/anchor/nz-anchor-link.component.ts	100% <ø> (ø)	⬆️
components/breadcrumb/nz-breadcrumb.component.ts	100% <ø> (ø)	⬆️
components/date-picker/date-picker.component.ts	87.5% <ø> (ø)	⬆️
components/rate/nz-rate.component.ts	98.63% <ø> (ø)	⬆️
components/modal/nz-modal-ref.class.ts	100% <ø> (ø)	⬆️
... and 345 more

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[arnaudschlupp]

Hi! I was wondering, do you have any idea when this could land to master? A lot of folks will be happy about this :) and thanks a lot for the work you are doing here!

[vthinkxie]

Hi @arnaudschlupp will be merge into master in this month, thanks.