release(4.0.0): release 4.0.0

[fisherspy]

PR Checklist

Please check if your PR fulfills the following requirements:

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

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] 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: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

[codecov[bot]]

Codecov Report

Merging #775 (74dfc22) into master (d2d3cf5) will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #775      +/-   ##
==========================================
- Coverage   87.01%   86.99%   -0.02%     
==========================================
  Files         164      164              
  Lines        6645     6645              
  Branches     1109     1109              
==========================================
- Hits         5782     5781       -1     
  Misses        421      421              
- Partials      442      443       +1     

Impacted Files	Coverage Δ
...ts/input-item/custom-input/custom-input.service.ts	83.87% <0.00%> (-3.23%)	:arrow_down:

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