Change version and docs

CONTRIBUTING.md

@@ -125,7 +125,7 @@ For example:
 sbt assembly
 
 $SPARK_HOME/bin/spark-shell \
---jars ./target/scala-2.12/qbeast-spark-assembly-0.3.0-alpha.jar \
+--jars ./target/scala-2.12/qbeast-spark-assembly-0.3.0.jar \
 --conf spark.sql.extensions=io.qbeast.spark.internal.QbeastSparkSessionExtension \
 --packages io.delta:delta-core_2.12:1.2.0
 ```

README.md

@@ -91,9 +91,10 @@ export SPARK_HOME=$PWD/spark-3.1.1-bin-hadoop3.2
 
 ```bash
 $SPARK_HOME/bin/spark-shell \
+--repositories https://s01.oss.sonatype.org/content/repositories/snapshots \
 --conf spark.sql.extensions=io.qbeast.spark.internal.QbeastSparkSessionExtension \
 --conf spark.sql.catalog.spark_catalog=io.qbeast.spark.internal.sources.catalog.QbeastCatalog \
---packages io.qbeast:qbeast-spark_2.12:0.3.0,io.delta:delta-core_2.12:1.0.0
+--packages io.qbeast:qbeast-spark_2.12:0.3.0-SNAPSHOT,io.delta:delta-core_2.12:1.2.0
 ```
 
 ### 2. Indexing a dataset
@@ -173,11 +174,11 @@ qbeastTable.analyze()
 Go to [QbeastTable documentation](./docs/QbeastTable.md) for more detailed information.
 
 # Dependencies and Version Compatibility
-| Version     | Spark | Hadoop | Delta Lake |
-|-------------|:-----:|:------:|:----------:|
-| 0.1.0       | 3.0.0 | 3.2.0  |   0.8.0    |
-| 0.2.0       | 3.1.x | 3.2.0  |   1.0.0    |
-| 0.3.0-alpha | 3.2.x | 3.3.x  |   1.2.x    |
+| Version    | Spark | Hadoop | Delta Lake |
+|------------|:-----:|:------:|:----------:|
+| 0.1.0      | 3.0.0 | 3.2.0  |   0.8.0    |
+| 0.2.0      | 3.1.x | 3.2.0  |   1.0.0    |
+| 0.3.0 | 3.2.x | 3.3.x  |   1.2.x    |
 
 Check [here](https://docs.delta.io/latest/releases.html) for **Delta Lake** and **Apache Spark** version compatibility.  
 

build.sbt

@@ -1,7 +1,7 @@
 import Dependencies._
 import xerial.sbt.Sonatype._
 
-val mainVersion = "0.3.0-alpha"
+val mainVersion = "0.3.0"
 
 lazy val qbeastCore = (project in file("core"))
   .settings(