[Auto release] release 1.4.2

🆕 feat

@visactor/vtable: corner title can display row and column diemensionTitle #1926
@visactor/vtable: add column hide config #1991
@visactor/vtable: add getCellAtRelativePosition api
🐛 fix
@visactor/vtable: when not exit edit state then can not select other cells #1974
@visactor/vtable: selected_clear event trigger #1981
@visactor/vtable: pivotTable virtual node edit value not work #2002
@visactor/vtable: tooltip content can not be selected #2003
@visactor/vtable: fix vrender export module
@visactor/vtable: fix merge cell update performance problem #1972
@visactor/vtable: fix regexp format for webpack 3 #2005
@visactor/vtable: fix width computation in shrinkSparklineFirst mode
🔨 refactor
@visactor/vtable: sparkline cellType set aggregationType None automatically #1999