Updated docs to correct version + mention tokio03 feature flag#909

Merged

yoshuawuyts merged 2 commits intoasync-rs:masterfrom TapGhoul:master

Nov 6, 2020

+17-7

Commits on Nov 4, 2020

Updated docs to correct version + mention tokio03 feature flag, updated CHANGELOG.md to add diff for 1.6.5...1.7.0
TapGhoul
committed
Fixed updated docs to match the 80 column style the rest of the docs use
TapGhoul
committed