Add support for several more submodule functions#1012

Open

leftink wants to merge 2 commits intolibgit2:masterfrom leftink:submodule_features

+250-11

Commits on May 31, 2020

Add support for several more submodule functions
leftink
committed

Commits on Nov 25, 2020

Merge branch 'master' into submodule_features
leftink
committed