Add publish through Wercker

Author: cosmincatalin

build.sbt

@@ -2,18 +2,20 @@ organization := "com.audienceproject"
 
 name := "spark-dynamodb"
 
-version := "0.3.2"
+version := "0.3.3"
 
 description := "Plug-and-play implementation of an Apache Spark custom data source for AWS DynamoDB."
 
-scalaVersion := "2.11.12"
+scalaVersion := "2.12.7"
+
+crossScalaVersions := Seq("2.11.12", "2.12.7")
 
 resolvers += "DynamoDBLocal" at "https://s3-us-west-2.amazonaws.com/dynamodb-local/release"
 
 libraryDependencies += "com.amazonaws" % "aws-java-sdk-dynamodb" % "1.11.325"
 libraryDependencies += "com.amazonaws" % "DynamoDBLocal" % "[1.11,2.0)" % "test"
 
-libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.3.1" % "provided"
+libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.4.0" % "provided"
 libraryDependencies += "com.google.guava" % "guava" % "14.0.1" % "provided"
 
 libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % "test"

project/build.properties

@@ -1 +1 @@
-sbt.version = 0.13.15
+sbt.version = 1.2.6

wercker.yml

@@ -1,21 +1,33 @@
-box: bigtruedata/sbt:0.13.15-2.11
+box:
+    id: audienceproject/jvm
+    username: $DOCKERHUB_ACCOUNT
+    password: $DOCKERHUB_PASSWORD
+    tag: latest
 
 build:
-  steps:
+    steps:
     - script:
-      name: Compile
-      code: |
-        sbt clean compile
-
-publish:
-  steps:
+          name: Compile
+          code: |
+              sbt clean compile dependencyUpdates
     - script:
-      name: Publish
-      code: |
-        mkdir -p ~/.sbt/0.13/
-        touch ~/.sbt/0.13/sonatype.sbt
-        echo 'credentials += Credentials("Sonatype Nexus Repository Manager",' >> ~/.sbt/0.13/sonatype.sbt
-        echo '                           "oss.sonatype.org",' >> ~/.sbt/0.13/sonatype.sbt
-        echo '                           "'$NEXUS_USER'",' >> ~/.sbt/0.13/sonatype.sbt
-        echo '                           "'$NEXUS_PASSWORD'")' >> ~/.sbt/0.13/sonatype.sbt
-        sbt publish
+          name: Clean again
+          code: |
+              sbt clean
+
+publish-snapshot:
+    steps:
+    - audienceproject/[email protected]:
+          user: $NEXUS_USER
+          password: $NEXUS_PASSWORD
+          private-key: $NEXUS_PK
+          passphrase: $NEXUS_PASSPHRASE
+
+publish-release:
+    steps:
+    - audienceproject/[email protected]:
+          user: $NEXUS_USER
+          password: $NEXUS_PASSWORD
+          private-key: $NEXUS_PK
+          passphrase: $NEXUS_PASSPHRASE
+          destination: RELEASE