v2.1.0

d966630 Set version 2.1.0
ae47fa6 Add action version check
9ad6986 Copy from absolute path
858755a Use arg 0 to wrap as action
f048eda GitHub output adaptor
9108c30 Update git-diff-driver to V2
f79e55c Get GOROOT from go env tool
4147f1d Bump gopkg.in/yaml.v3 from 3.0.0-20200615113413-eeeca48fe776 to 3.0.0
0dc0396 Update library usage version note