Merge pull request #1339 from scala-steward/update/sbt-protobuf-0.7.3

Update sbt-protobuf to 0.7.3

Author: eed3si9n

project/plugins.sbt

@@ -6,7 +6,7 @@ addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.5.3")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.4.7")
 addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.10.0")
-addSbtPlugin("com.github.sbt" % "sbt-protobuf" % "0.7.2")
+addSbtPlugin("com.github.sbt" % "sbt-protobuf" % "0.7.3")
 libraryDependencies += "com.github.os72" % "protoc-jar" % "3.11.4"
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.3")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.11.0")