You may check the corresponding capabilities JSON schema at https://github.com/Microsoft/PowerBI-visuals-tools/tree/master/templates/visuals/.api. Now the default API version for new visuals is 1.2.0.
You may check the corresponding capabilities JSON schema at https://github.com/Microsoft/PowerBI-visuals-tools/tree/master/templates/visuals/.api. Now the default API version for new visuals is 1.2.0.