Update browser support caveats#2441

Merged

alexcrichton merged 2 commits intorustwasm:masterfrom

AminArria:patch-2

Feb 3, 2021

Commits on Feb 2, 2021

Update browser support caveats
AminArria
authored

Commits on Feb 3, 2021

Keep sections and specify support starting on version
AminArria
authored