Update gcs-connector to 3.0.0 (#121)

Author: Michel Davit

build.sbt

@@ -4,7 +4,7 @@ organization := "com.spotify.data"
 name := "gcs-tools"
 
 val avroVersion = "1.11.3"
-val gcsConnectorVersion = "3.0.0-RC01"
+val gcsConnectorVersion = "3.0.0"
 val guavaVersion = "31.1-jre" // otherwise android is taken
 val hadoopVersion = "3.3.6"
 val jacksonVersion = "2.15.0"