Support both DRONE_COMMIT_AUTHOR and DRONE_COMMIT_AUTHOR_NAME as template {{commit.author}} variable

[rng3r]

My droneCI send only DRONE_COMMIT_AUTHOR_NAME=Anatoly Semenov env variable, but did not send DRONE_COMMIT_AUTHOR and telegram plugin match only by
cli.StringFlag{
Name: "commit.author",
Usage: "git author name",
EnvVar: "DRONE_COMMIT_AUTHOR",
},

Could its see to both variables or add additional commit.xxx template variales ?