chore: optimize format value

[kerm1it]

格式化值统一使用 formatValue 方法，防止有的 format 是函数，然后报错(https://github.com/ant-design/ant-design/issues/27155)。

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[codecov]

Codecov Report

Merging #156 into master will decrease coverage by 0.00%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #156      +/-   ##
==========================================
- Coverage   99.59%   99.59%   -0.01%     
==========================================
  Files          45       45              
  Lines        1999     1998       -1     
  Branches      588      596       +8     
==========================================
- Hits         1991     1990       -1     
  Misses          6        6              
  Partials        2        2              

Impacted Files	Coverage Δ
src/panels/MonthPanel/MonthHeader.tsx	100.00% <ø> (ø)
src/panels/QuarterPanel/QuarterHeader.tsx	100.00% <ø> (ø)
src/panels/DatePanel/DateHeader.tsx	83.33% <50.00%> (-1.67%)	⬇️
src/panels/MonthPanel/MonthBody.tsx	91.30% <50.00%> (ø)
src/RangePicker.tsx	100.00% <100.00%> (ø)
src/panels/DatePanel/DateBody.tsx	96.00% <100.00%> (ø)
src/panels/QuarterPanel/QuarterBody.tsx	100.00% <100.00%> (ø)
src/panels/TimePanel/TimeHeader.tsx	100.00% <100.00%> (ø)
src/panels/YearPanel/YearBody.tsx	100.00% <100.00%> (ø)

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[kerm1it]

覆盖率下降是因为格式化的原因，应该不影响。

[zombieJ]

+ rc-picker@2.3.1