ERC20._approve#1609

Merged

nventuro merged 5 commits intoOpenZeppelin:masterfrom

nventuro:internal-approve

Jan 21, 2019

Commits on Jan 15, 2019

Add ERC20._approve.
nventuro
committed

Commits on Jan 16, 2019

Commits on Jan 17, 2019

Require owner in _approve to be non-zero.
nventuro
committed

Commits on Jan 21, 2019

Merge branch 'master' into internal-approve
nventuro
authored