R1C1 conversion should handle absolute A1 references#2060

Merged

MarkBaker merged 4 commits intoPHPOffice:masterfrom

hyraiq:r1c1-absolute-address

May 7, 2021

Commits on May 4, 2021

Commits on May 5, 2021

Remove complexity from AddressHelper::convertToR1C1
ndench
committed

Commits on May 7, 2021

Use named regex groups and constants for regex strings
ndench
committed