fix: disabledHours & feat: now work with step

[07akioni]

fix: disabledHours works unexpectly when using 12 hours
fix ant-design/ant-design#21159

1. Hour should start from 12 at both AM and PM.
2. Hour should be disabled by 0 ~ 23, not 0 ~ 11.
3. AM & PM should be disabled at proper time.

feat: now button should work with time step
resolve ant-design/ant-design#25054

[codecov]

Codecov Report

Merging #88 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #88      +/-   ##
==========================================
+ Coverage   99.55%   99.56%   +0.01%     
==========================================
  Files          42       43       +1     
  Lines        1792     1839      +47     
  Branches      538      551      +13     
==========================================
+ Hits         1784     1831      +47     
  Misses          6        6              
  Partials        2        2              

Impacted Files	Coverage Δ
src/panels/TimePanel/TimeUnitColumn.tsx	100.00% <ø> (ø)
src/PickerPanel.tsx	100.00% <100.00%> (ø)
src/panels/TimePanel/TimeBody.tsx	100.00% <100.00%> (ø)
src/utils/timeUtil.ts	100.00% <100.00%> (ø)

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[afc163]

顺便把 ant-design/ant-design#25054 也修了吧

[afc163]

标题要有语义。

[zombieJ]

@07akioni @afc163 我比较坚持截断时间而不是就近取 Now。像跨天的场景：
steps: [1, 30, 1] 在 23:46:00 的时候点击了 Now 变成了第二天的 00:00:00 是很怪异的情况。
时间也应该和天一样做截断才对。

[afc163]

01:44 和 01:46 同属 01:30 时间段，四舍五入确实会比较奇怪。

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[zombieJ]

+ rc-picker@1.9.0