fix issue1957: parse Dayjs object with plugin objectSupport

[BePo65]

Plugin objectSupport failed, when parsing a Dayjs object, as it only could handle Date object and the plain objectSupport object.

[codecov[bot]]

Codecov Report

Merging #1963 (1856cc2) into dev (cbe91fd) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               dev     #1963   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          183       183           
  Lines         2096      2096           
  Branches       550       549    -1     
=========================================
  Hits          2096      2096           

Impacted Files	Coverage Δ
src/plugin/objectSupport/index.js	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.